Historic inaugurations

A military unit marches down Washington's Pennsylvania Avenue past the reviewing stand during the inaugural parade held after Ronald Reagan was sworn in as the nation's 40th president in Washington, D.C., Jan. 20, 1981. (AP Photo)

A military unit marches down Washington's Pennsylvania Avenue past the reviewing stand during the inaugural parade held after Ronald Reagan was sworn in as the nation's 40th president in Washington, D.C., Jan. 20, 1981. (AP Photo)