President Barack Obama places a wreath of flowers at the Tomb of the Unknown Soldier at Arlington National Cemetery during Veterans Day observance on Nov. 11, 2015. Maj. Gen. Bradley Becker, Commander of Joint Force Headquarters National Capitol Region, is at left.WASHINGTON, DC - NOVEMBER 11: U.S. veterans attend a Veterans Day ceremony at the National World War II Memorial November 11, 2015 in Washington, DC. Originally established as Armistice Day in 1919, the holiday was renamed Veterans Day in 1954 by President Dwight Eisenhower and honors those who have served in the U.S. military. (Photo by Win McNamee/Getty Images)WASHINGTON, DC - NOVEMBER 11: National Park Service volunteers make etchings from the names of fallen soldiers during a Veterans Day observance at the Vietnam Veterans Memorial November 11, 2015 in Washington, DC. Originally established as Armistice Day in 1919, the holiday was renamed Veterans Day in 1954 and honors those who have served in the military. (Photo by Win McNamee/Getty Images)NEW YORK, NY - NOVEMBER 11: Gavin Kinney (9) holds up a sign thanking veterans at the nation's largest Veterans Day Parade in New York City on November 11, 2015 in New York City. Known as "America's Parade" it features over 20,000 participants, including veterans of numerous eras, military units, businesses and high school bands and civic and youth groups. (Photo by Spencer Platt/Getty Images)WASHINGTON, DC - NOVEMBER 11: American flags and POW-MIA flags are distributed to guests during a Veterans Day observance at the Vietnam Veterans Memorial November 11, 2015 in Washington, DC. Originally established as Armistice Day in 1919, the holiday was renamed Veterans Day in 1954 and honors those who have served in the military. (Photo by Win McNamee/Getty Images)WWII Veterans place wreaths at the World War II Memorial on Veteran's Day in Washington, DC, November 11, 2015. AFP PHOTO / JIM WATSONJIM WATSON/AFP/Getty ImagesMIAMI BEACH, FL - NOVEMBER 11: Mike Elliott, from the All Veteran Parachute Team, soars through the air with an American flag during a Veterans day ceremony on November 11, 2015 in Miami Beach, Florida. Originally established as Armistice Day in 1919, the holiday was renamed Veterans Day in 1954 by President Dwight Eisenhower, and honors those who have served in the U.S. military. (Photo by Joe Raedle/Getty Images)The oldest known female World War II vet, Army Lieutenant Colonel Luta C. McGrath (R), who turns 108 later this month, attends Veteran's Day ceremonies at Arlington National Cemetery in Arlington, Virginia, November 11, 2015. AFP PHOTO / SAUL LOEBSAUL LOEB/AFP/Getty ImagesWASHINGTON, DC - NOVEMBER 11: A U.S. honor guard stands at attention during a Veterans Day ceremony at the National World War II Memorial November 11, 2015 in Washington, DC. Originally established as Armistice Day in 1919, the holiday was renamed Veterans Day in 1954 by President Dwight Eisenhower and honors those who have served in the U.S. military. (Photo by Win McNamee/Getty Images)President Barack Obama is escorted by Maj. Gen. Bradley Becker, Commander of Joint Force Headquarters National Capitol Region to the Tomb of the Unknown Soldier at Arlington National Cemetery during Veterans Day observance on Nov. 11, 2015.WASHINGTON, DC - NOVEMBER 11: World War II veteran and former Sen. Bob Dole (R-KS) greets fellow veterans while attending a Veterans Day ceremony at the National World War II Memorial November 11, 2015 in Washington, DC. Originally established as Armistice Day in 1919, the holiday was renamed Veterans Day in 1954 by President Dwight Eisenhower and honors those who have served in the U.S. military. (Photo by Win McNamee/Getty Images)MIAMI BEACH, FL - NOVEMBER 11: Xavier Barnett watches as members of the Miami Beach Senior High School NJROTC march past during a Veterans day parade on November 11, 2015 in Miami Beach, Florida. Originally established as Armistice Day in 1919, the holiday was renamed Veterans Day in 1954 by President Dwight Eisenhower, and honors those who have served in the U.S. military. (Photo by Joe Raedle/Getty Images)WASHINGTON, DC - NOVEMBER 11: A bagpipe player plays "Taps" on the top of the Vietnam Veterans War Memorial during a Veterans Day observance November 11, 2015 in Washington, DC. Originally established as Armistice Day in 1919, the holiday was renamed Veterans Day in 1954 and honors those who have served in the military. (Photo by Win McNamee/Getty Images)NEW YORK, NY - NOVEMBER 11: A couple in period uniforms watch as members of the U.S. Army march in the the nation's largest Veterans Day Parade in New York City on November 11, 2015 in New York City. Known as "America's Parade" it features over 20,000 participants, including veterans of numerous eras, military units, businesses and high school bands and civic and youth groups. (Photo by Spencer Platt/Getty Images)Army Honor guard marches to the Tomb of the Unknowns at Arlington National Cemetery during Veterans Day observance on Nov. 11, 2015. (Alan Lessig/Staff)A member of the Old Guard carries a wreath to lay beside the Tomb of the Unknown Soldier at Arlington National Cemetery. Numerous veteran groups presented wreaths to join one that was presented by President Barak Obama as part of Veterans Day observance. (Alan Lessig/Staff)Members of the Vietnam Veterans of America carry a wreath to lay beside the Tomb of the Unknown Soldier at Arlington National Cemetery. Numerous veteran groups presented wreaths to join one that was left by President Barak Obama as part of Veterans Day observance.