US and Iran exchange attacks as lull in war appears over

WASHINGTON/CAIRO, Sept 2 (Reuters) - The U.S. and Iran found themselves back in a war footing on Wednesday after the most significant exchange in weeks, with Washington threatening even more devastating strikes while Iran protested an attack that it said killed five and wounded dozens of civilians at a wedding. The U.S. military's Central Command said it completed a wave of strikes against Islamic Revolutionary Guard Corps targets on Tuesday including air defense sites, radar systems, maritime…