Most turns are just run to cover then either shoot an alien or go into overwatch.

FORBES: Move up http://i.forbesimg.com t Move down

American troops are shifting from leading operations, to partnering with Iraqi forces, and, eventually, to a protective overwatch mission.

NPR: Text of Bush's State of the Union Address

Some troops would need to stay in the country to support the Afghan troops and provide an "overwatch role", he told MPs.

BBC: Foreign Office questions