A new iPhone app has been designed to help troops stay up to speed on the Patriot anti-missile system, but users won't find this program in the iTunes App Store-it's by invitation only. Made strictly for the military and containing detailed information on the major defense system, the Raytheon Company-developed Patriot Crew Drill app is a multiple-choice game aimed at helping troops on the front lines of Iraq and Afghanistan who, in peacetime, would be dedicated to operating the Patriot anti-missile system. Many soldiers go for months or even a year without operating the system, and the game serves as a refresher and a way to stay sharp. The app runs a soldier through the steps they must go through to assemble and set up the Patriot anti-missile system. It presents the user with a scenario and three multiple-choice questions. Answer successfully and move on in the game. Fail the test and feel the wrath of a virtual staff sergeant. Raytheon said in a statement it intends to launch a number of iPhone military apps in the future. These sites are not affiliated with AFCEA or SIGNAL Magazine, and we are not responsible for the content or quality of the products offered. When visiting new websites, please use proper Internet security procedures.