On 10 January 2003 President George W. Bush signed Change 2 to the 2002 Unified Command Plan assigning new missions to U.S. Strategic Command (USSTRATCOM). In addition to previously assigned responsibilities and missions transferred from the former USSTRATCOM and U.S. Space Command, USSTRATCOM assumed responsibility for the previously unassigned mission areas of Global Strike (GS); Global Missile Defense; elements of Department of Defense (DoD) Information Operations (IO); aspects of Global Command, Control, Communications and Computers (C4) services; and DoD Intelligence, Surveillance and Reconnaissance (ISR). Subsequently, the U.S. Army Space and Missile Defense Command (SMDC) became the Army Service Component Command (ASCC) for USSTRATCOM and designated as Army Forces Strategic Command (ARSTRAT)