Sen. John Glenn poses for a portrait shortly after doing live television interviews from the Ohio State University Union building on Monday, Feb. 20,

Sen. John Glenn poses for a portrait shortly after doing live television interviews from the Ohio State University Union building on Monday, Feb. 20, 2012, in Columbus, Ohio. Feb. 20 marked the 50th anniversary of his historic flight. Glenn was the first American to orbit Earth.

Sen. John Glenn poses for a portrait shortly after doing live television interviews from the Ohio State University Union building on Monday, Feb. 20, 2012, in Columbus, Ohio. Feb. 20 marked the 50th anniversary of his historic flight. Glenn was the first American to orbit Earth.