Trump says Iran operation could take "four weeks or less," 3 U.S. troops killed

The Pentagon confirmed Sunday that three U.S. service members have been killed in the war with Iran, the first American casualties of the operation. CBS News has learned that the casualties occurred among American personnel based in Kuwait.
President Trump released a video message saying the military operation will continue "until all of our objectives are achieved" and that more casualties are possible. In an interview, he said it could "take four weeks or less." Mr. Trump said he's agreed to speak with Iran and that the military operation is proceeding "ahead of schedule."