Anderson Cooper 360

Reports: New Airstrike Targets Iran-Backed Militia Near Baghdad; Pres. Trump: Iranian Commander Killed By U.S. Was Plotting "Imminent And Sinister" Attacks Against Americans; New Troops Heading To Region; Wash. Post: Dems To Submit Impeachment Articles in Coming Days; U.S. Deploying Thousands More Troops To Mideast As Iran Vows Revenge For Killing Of Top General; Pres. Trump on Deadly Airstrike That Killed Top Iranian General: "We Did Not Take Action To Start A War"; Iran Vows "Harsh Revenge" After U.S. Kills Top General; Wash Post: Some Dems Privately Worried About Sending Impeachment Articles To Senate Amid Iran Tensions via Knit