Legislation approved Wednesday by the Senate Public Safety Committee would require the state Division of Emergency Management to come up with recommendations about what kinds of things Arizonans should buy now and store in the garage, basement or storage room just in case some enemy detonates a nuclear or other bomb that wipes out power and communications in the state — and possibly nationwide. That recommendation also would spell out exactly how much food, water and medical supplies should be available to last for weeks or months. And the state agency would have to updated that list every five years. SB 1476 is being pushed by Sen. David Farnsworth, R-Mesa, amid concerns about an electromagnetic pulse that can be caused by certain types of explosion.