Summary: GAO reviewed the justifications for the fiscal year 1993 budget requests of $1.7 billion for 13 missile systems. GAO identified $47.4 million in potential reductions and rescissions to five of the 13 missile programs: $22.2 million in potential reductions to the fiscal year 1993 requests for two systems, $17.8 million in potential rescissions from the fiscal year 1992 appropriation for two systems, and $7.4 million in potential rescissions from the fiscal year 1991 Operation Desert Shield/Desert Storm supplemental appropriation for one system. These reductions and rescissions are possible because: (1) requirements are questionable or have been reduced; (2) costs are less than anticipated; and (3) more current information indicates that decreases are possible. GAO found no potential reductions or rescissions for eight of the missile systems it reviewed. GAO did identify issues concerning two missile systems--the Javelin and the Extended Range Interceptor Technology program--that are important to the appropriation deliberations. These issues involve: (1) whether the advance procurement funding for the Javelin will be needed; and (2) whether, if appropriated, the total funding requested for the Extended Range Interceptor Technology program will be used for that purpose.