The site navigation utilizes arrow, enter, escape, and space bar key commands. Left and right arrows move across top level links and expand / close menus in sub levels. Up and Down arrows will open main level menus and toggle through sub tier links. Enter and space open menus and escape closes them as well. Tab will move on to the next part of the site rather than go through menu items.
President Nixon announces that 45,000 additional U.S. troops will leave Vietnam by the end of January 1972. This leaves fewer than 140,000 American troops in South Vietnam.1