NEW YORK - MAY 18: First lady Michelle Obama greats members of the public at the ribbon cutting ceremony to officially re-open the Charles Engelhard Court, centerpiece of the newly renovated American Wing, at The Metropolitan Museum of Art on May 18, 2009 in New York City. Getty [Four Secret Service agents behind her.]

Michelle Obama reopened a refurbished section of the American Wing at the Metropolitan Museum of Art on Monday. Damon Winter/The New York Times

First Lady Michelle Obama, center, hugs P.S. 325 5th graders Maria Palacios, 11, right, and Emily Martinez, 11, during the ribbon cutting ceremony officially reopening the Charles Engelhard Court of the newly renovated American Wing at the Metropolitan Museum of Art in New York , Monday, May 18, 2009. AP

US First Lady Michelle Obama (L) greets supporters after she cut a ribbon officially opening the newly renovated American Wing at the Metropolitan Museum of Art on May 18, 2009 in New York. Getty [Five Secret Service agents behind her, 4 male, 1 female.]

MERCED, CA - MAY 16: First Lady Michelle Obama (C) waves to the crowd as (L-R) Sung-Mo Kang, chancellor of UC Merced, Mark G. Yudof, president, University of California and Richard C. Blum, Chairman of Regents of the University of California look on before Michelle Obama delivers the commencement speech at the University of California, Merced on May 16, 2009 in Merced, California. The 500 graduating students receiving diplomas are the first graduating class since the university opened in 2005. Getty [Secret Service agent above right diagonally of Michelle.]

U.S. first lady Michelle Obama waves to graduating students prior to her speech to the first four-year graduating class at the University of California Merced in Merced, California May 16, 2009.

First lady Michelle Obama, right, greets members of the audience after delivering remarks for the Corporation for National and Community Service, Tuesday, May 12, 2009, at the Ronald Reagan Building in Washington.

MERCED, CA - MAY 16: First Lady Michelle Obama Delivers the commencement speech at the University of California, Merced on May 16, 2009 in Merced, California. The 500 graduating students receiving diplomas are the first graduating class since the university opened in 2005. Getty [SS agent behind Michelle' right hand. Agents suspect black camera holders.]

Security forces watch as Air Force One with President Obama aboard leave Michiana Regional Airport Sunday, May 17, 2009 in South Bend, Ind. Obama delivered Notre Dame's commencement address and received an honorary degree earlier Sunday. AP

President Barack Obama waves after arriving to deliver the commencement speech during the 2009 graduation ceremony at the University of Notre Dame in South Bend, Ind. Sunday, May 17, 2009. Left is Notre Dame President the Rev. John Jenkins, and right is board of trustees chairman Dick Notebaert. AP [Notebaert at right, Secret Service agent Joe Clancy left of Obama with his tasseled hat on, hands ready.]

U.S. President Barack Obama pauses prior to speaking at the University of Notre Dame during commencement ceremonies in South Bend, Indiana, May 17, 2009. Reuters

President Barack Obama holds his hand outstretched during a blessing for graduates during commencement exercises at the University of Notre Dame in South Bend, Ind. Sunday, May 17, 2009. Center is board of trustees chairman Dick Notebaert. AP [Not Notebaert, but Secret Service agent Joe Clancy.]

President Barack Obama holds his hand outstreched during a blessing for graduates during commencement exercises at the University of Notre Dame in South Bend, Ind. Sunday, May 17, 2009. Center is board of trustees chairman Dick Notebaert. AP [Correct about Notebaert.]

US President Barack Obama greets graduates May 17, 2009 after attending the commencement ceremony in the Joyce Center of Notre Dame University in South Bend, Indiana. US President Barack Obama waded into an impassioned outcry from anti-abortion campaigners as he prepared to speak Sunday at one of America's most prestigious Catholic universities. Obama was to deliver the commencement address for graduating students and receive a honorary degree at the University of Notre Dame, pitting him headlong into the nation's culture wars on an issue that he has tried hard to finesse. Getty

U.S. President Barack Obama greets graduates after addressing commencement ceremonies at the University of Notre Dame in South Bend, Indiana, May 17, 2009. Reuters

U.S. President Barack Obama (C) pages through a program prior to speaking at commencement ceremonies at the University of Notre Dame in South Bend, Indiana, May 17, 2009. Reuters [Secret Service agent Joe Clancy at left.]

US President Barack Obama walks to the stage May 17, 2009 to attend the commencement ceremony in the Joyce Center of Notre Dame University in South Bend, Indiana. Obama waded into an impassioned outcry from anti-abortion campaigners as he prepared to speak Sunday at one of America's most prestigious Catholic universities. Obama was to deliver the commencement address for graduating students and receive a honorary degree at the University of Notre Dame, pitting him headlong into the nation's culture wars on an issue that he has tried hard to finesse. Getty [ Four Secret Service agents in background.]

President Barack Obama arrives in Indianapolis, Ind. , Sunday, May 17, 2009. AP

US President Barack Obama acknowledges applause after receiving an honorary doctor of laws degree May 17, 2009 during the commencement ceremony in the Joyce Center of Notre Dame University in South Bend, Indiana. Obama waded into an impassioned outcry from anti-abortion campaigners as he prepared to speak Sunday at one of America's most prestigious Catholic universities. Obama was to deliver the commencement address for graduating students and receive a honorary degree at the University of Notre Dame, pitting him headlong into the nation's culture wars on an issue that he has tried hard to finesse. Getty [Secret Service agent Joe Clancy left of Obama.]

US President Barack Obama (C) celebrates after his daughter Sasha's soccer team scored a goal during a game in Georgetown, May 16, 2009 in Washington, DC. Getty [Secret Service agent third from right.]

U.S. President Barack Obama (C) reacts as his younger daughter Sasha plays soccer at the Boys and Girls club in Washington May 16, 2009. Reuters [Secret Service agent third from left.]

RIO RANCHO, NM - MAY 14: President Barack Obama addresses a crowd at the Rio Rancho High School gymnasium during a Town Hall meeting on May 14, 2009 in Rio Rancho, New Mexico. The President is drumming up support for proposed tightening of regulation surrounding the credit card industry. Getty

RIO RANCHO, NM - MAY 14: President Barack Obama addresses a crowd at the Rio Rancho High School gymnasium during a Town Hall meeting on May 14, 2009 in Rio Rancho, New Mexico. The President is drumming up support for proposed tightening of regulation surrounding the credit card industry. Getty

US President Barack Obama (R) arrives at Sky Harbor Airport in Phoenix, Arizona, May 13, 2009. President Obama will address graduates, family members, and faculty at Arizona State University's 2009 commencement ceremony. Getty

US President Barack Obama (C) greets wellwishers as he arrives at Sky Harbor Airport in Phoenix, Arizona, May 13, 2009. President Obama will address graduates, family members, and faculty at Arizona State University's 2009 commencement ceremony. Getty

President Barack Obama, left, walks with Air Force Col. Steven Shepro, Andrews Air Fore Base Commander and 316th Wing Commander, to greet guests prior to boarding Air Force One, Wednesday, May 13, 2009, at Andrews Air Force Base, Md. AP [Secret Service agent Joe Clancy at right.]

President Barack Obama greets well wishers prior to boarding Air Force One at Andrews Air Force Base in Maryland, Wednesday, May 13, 2009, en route to Arizona State University in Tempe, Ariz. , where he will speak at the commencement ceremony.  AP

WASHINGTON - MAY 9: U.S. President Barack Obama (C) steps from his vehicle at Ft. Lesley J. McNair's athletic facility, where he has arrived to play basketball May 9, 2009 in Washington, DC. Getty

WASHINGTON - MAY 9: Unidentified guests of President Barack Obama prepare to load into the president's motorcade on the South Lawn of the White House May 9, 2009 in Washington, DC. They would join the president for a game of basketball at Ft. Lesley J. McNair's athletic facility in Washington.

President Barack Obama's limousine, far right, is stopped in rush hour traffic as he returns to the White House from a parent-teacher conference for his daughter Malia in Washington, Friday, May 8, 2009. AP

President Barack Obama's limousine and motorcade is stopped at a traffic light during rush hour as he returns to the White House from a parent-teacher conference for his daughter Malia in Washington, Friday, May 8, 2009. AP

First Lady Michelle Obama arrives in New York City May 5, 2009. (Official White House Photo by Samantha Appleton)

ARLINGTON, VA - MAY 5: U.S. President Barack Obama (L) and U.S. Vice President Joe Biden order lunch at Ray's Hell Burger May 5, 2009 in Arlington, Virginia. Obama and Biden made an unannouced vist to the Arlington restaurant. Getty

U.S. President Barack Obama (C) waits in line with Vice President Joe Biden before placing their lunch orders at Ray's Hell Burger in Arlington, Virginia May 5, 2009. Reuters

U.S. Secret Service agents, right, stand watch as onlookers with cell phones position themselves by a window to photograph President Barack Obama, not pictured, who was eating lunch next door at Ray's Hell Burger in Arlington, Va. , Tuesday, May 5, 2009. AP

President Barack Obama stands on the running board of his limousine to wave to the crowd after he and Vice President Joe Biden, not pictured, had lunch at Ray's Hell Burger in Arlington, Va. , to have lunch, Tuesday, May 5, 2009. AP

WASHINGTON - MAY 2: A Secret Service Agent watches over people as they try and get a glimpse of First Lady Michelle Obama and President Barack Obama April 2, 2009 in Washington, DC. The couple went to dinner at Citronelle in Georgetown. Getty

WASHINGTON - MAY 2: President Barack Obama (L) and First Lady Michelle Obama (R) wave as they take a short walk along the South Lawn of the White House after returning from a night out April 2, 2009 in Washington, DC. The couple went to dinner at Citronelle in Georgetown. Getty

Secret Service agents polish the presidential limousine as they wait for the arrival of President Barack Obama Wednesday, April 29, 2009, in St. Louis. AP

A Secret Service agent stands watch as U.S. President Barack Obama speaks at a town hall meeting held at Fox Senior High School in Arnold, Missouri, April 29, 2009. Today is Obama's 100th day in office. Reuters

President Barack Obama greets members of the 131st Fighter Wing, Missouri Air National Guard, at Lambert-St. Louis International Airport in St. Louis, before departing on Air Force One April 29, 2009. Obama marked his 100th day in office with a town hall meeting in Arnold, Mo., earlier that day. (U.S. Air Force photo by Master Sgt. James McCullough/Released)

The green-lensed infrared counter-missile (IRCM) device at the rear of Air Force One; see devices at the rear of the four engines such as the one below.

U.S. Airmen from the 131st Fighter Wing, Missouri Air National Guard, wave as Air Force One takes off from Lambert-St. Louis International Airport in St. Louis, April 29, 2009. Obama marked his 100th day in office with a town hall meeting in Arnold, Mo., earlier that day. (U.S. Air Force photo by Master Sgt. James McCullough/Released)

President Barack Obama greets a member of the 131st Fighter Wing, Missouri Air National Guard, at Lambert-St. Louis International Airport in St. Louis, before departing on Air Force One April 29, 2009. Obama marked his 100th day in office with a town hall meeting in Arnold, Mo., earlier that day. (U.S. Air Force photo by Master Sgt. James McCullough/Released)