The Latest: US claims strikes on Iran's nuclear sites caused severe damage but full impact unclear

The U.S. military's strike on three sites in Iran raised urgent questions Sunday about what remains of Tehran’s nuclear program and how its weakened military might respond. The decision to directly involve the U.S. comes after more than a week of strikes by Israel on Iran that have moved to systematically eradicate the country’s air defenses and offensive missile capabilities, while damaging its nuclear enrichment facilities.