100 things to do in D.C.

The space shuttle Discovery soared around the Washington Monument and the White House in a salute to the nation's capital before landing for the last time near its new home at the Smithsonian's National Air and Space Museum annex in northern Virginia. (Steven F. Udvar-Hazy Center, 14390 Air and Space Museum Parkway, Chantilly, Va.) (Olivier Douliery, MCT)