Israel and Iran exchanged strikes a week into their war Friday as President Donald Trump weighed U.S. military involvement and new diplomatic efforts got underway.

Trump has been weighing whether to attack Iran by striking its well-defended Fordo uranium enrichment facility, which is buried under a mountain and widely considered to be out of reach of all but America's "bunker-buster" bombs. He said he'll decide within two weeks whether the U.S. military will get directly involved in the war given the "substantial chance" for renewed negotiations over Tehran's nuclear program.