president trump said iran will be held directly responsible. he also spoke by phone today with iraq's prime minister. more on the u.s. response in a moment, when we speak with the secretary of state, mike pompeo. but holly williams leads us off with what happened at the embassy in baghdad's green zone, which we should note is the most heavily guarded part of that note. >> reporter: thousands of protesters were somehow able to get past iraqi security forces into the fortified green zone td reach the u.s. embassy compound. they vented their anger with fires and with rocks. ohey pulled down signs, smashed a security booth, and broke into an embassy reception area. "death to america" they shouted, and "america is the greatest devil." "the embassy is a place of plotting against iraq," said militia leader qais al-khazali. "this place is where all operations of sabotage have been run."