U.S. blames Iran for Ukrainian jetliner downing, pledges probe

The U.S. promised "appropriate action" Friday in response to its assessment that an Iranian missile was responsible for downing a Ukrainian jetliner that crashed outside Tehran, as the Iranian government denied playing a role in the killing of all 176 people on board. Secretary of State Mike Pompeo became the highest-level U.S. official to directly pin the blame on Iran, after Canadian, Australian and British leaders announced similar intelligence conclusions Thursday. "We do believe it is likel