For the first time in nearly 100 years, the public walked on the Tomb of the Unknown Soldier Plaza and laid flowers at the tomb. “The neoclassical, white marble sarcophagus stands atop a hill overlooking Washington, D.C.,” according to the Arlington National Cemetery website. “Since 1921, it has provided a final resting place for one of America’s unidentified World War I service members, and Unknowns from later wars were added in 1958 and 1984.” Photos by Jack Gruber/USA TODAY