PARADE REHEARSAL Participants in the full-dress rehearsal of the 2009 Presidential Inaugural Parade make their way down Pennsylvania Avenue in Washington, D.C., Jan. 11, 2009. More than 5,000 men and women in uniform are providing military ceremonial support to the presidential inauguration, a tradition dating back to George Washington's 1789 inauguration. SHARE: Download: Full Size (0.06 MB) Credit: VIRIN: 801579-P-IDD40-118.jpg Photo Gallery