U.S. bombs Iran's civilian infrastructure for first time after "Stone Ages" threat

The U.S. military on Thursday attacked major civilian infrastructure in Iran for the first time, hours after President Trump threatened in a prime-time address to bomb the country "back to the Stone Ages." Why it matters: The attack on the B-1 bridge near Tehran signals a widening of the U.S. military's targets and could be a first step toward attacks on energy, water and transportation infrastruc