On February 25, 1991, during the Gulf War, a U.S. Patriot missile battery failed to intercept an incoming Scud missile, which struck a barracks, killing 28 soldiers and injuring dozens. The cause of the failure was an inaccurate calculation of the time since boot due to arithmetic errors in the software that accumulated over time. Write a safety scenario that addresses the Patriot failure and discuss tactics that might have prevented it.