Strategic bombing
A full cadre of generals at Offutt participated in many of the missions of the "Looking Glass", a KC-135 air tanker which was stripped and refitted with state of the art electronics which would take over in case the president was killed in wartime.  The plane had several generals on board to assume wartime duties.  The "red telephone" was an instant connection to the president at the White House.  The plane flew all day every day, three planes took off a day in overlapping flights to provide this level of coverage.  Since the end of the cold war, this flight ended, however, the Strategic Air Command still maintains the main facility at Offutt AFB - this is where President Bush flew to when the Twin Towers were bombed on 9-11-01 to set up his command center.