An E-6B Mercury is being moved into a Hanger at the Boeing Aerospace Support Center, Cecil Field Fla., to be retrofitted with a new cockpit and an advanced communications package in April 2003. The E-6B is a dual-mission aircraft capable of fulfilling either the E-6A mission or the airborne strategic command post mission and is equipped with an airborne launch control system (ALCS). The ALCS is capable of launching U.S. land based intercontinental ballistic missiles.