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 likely that that plane was shot down by an Iranian missile,” he said.

Pompeo said an investigation would continue into the incident and that once it was complete he was “confident that we and the world will take appropriate action as a response.” Leaders said the plane appeared to have been unintentionally hit by a surface-to-air missile. But how feasible will an investigation be amid a high number of existing sanctions on Iran? Today we talk about the increasing number of sanctions being imposed on Iran, and check in on the timeline for a Senate impeachment trial and the likelihood of Speaker of the House Nancy Pelosi delivering the articles of impeachment.

With files from the Associated Press.

Guests:

Eli Stokols, DC-based White House reporter for The Los Angeles Times; he tweets

Capt. John M. Cox, veteran aviation pilot and CEO of Safety Operating Systems, a aviation consulting firm located in Washington, DC