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Marking Veterans Day at Arlington National Cemetery

Kevin Lamarque / Reuters

Marine Corps veteran Robert Flick looks out from behind a flag during a Veterans Day ceremony at Arlington National Cemetery in Virginia on Nov. 11, 2011.

Evan Vucci / AP

People arrive at the Amphitheater at Arlington National Cemetery in Arlington, V., Friday, Nov. 11, 2011, for a Veterans Day ceremony where President Barack Obama will speak.

Chip Somodevilla / Getty Images

President Barack Obama pauses for a moment after placing a wreath at the Tomb of the Unknowns ad Sgt.1st Class Chad Eric Wayne Stackpole (R), 3rd U.S. Infantry Regiment Sergeant of the Guard, looks on during a Veterans Day full honor ceremony at Arlington National Cemetery November 11, 2011 in Arlington, Virginia. Obama delivered remarks at the cemetery amphitheater after laying the wreath.

A day to honor and remember those who bravely serve the country. Thank you.

See more images from Veterans Day

Chip Somodevilla / Getty Images

Visitors watch in silence as soldiers from the 3rd U.S. Infantry Regiment, called the "Old Guard," perform the changing of the guard at the Tomb of the Unknowns before a Veterans Day full honor ceremony at Arlington National Cemetery on Nov, 11, 2011 in Arlington, Virginia.

Kevin Lamarque / Reuters

Visitors listen during a Veterans Day ceremony at Arlington National Cemetery in Virginia on Nov. 11, 2011.