warning to russia over it's alleged meling, attempt to meddle in the u.s. election, the president at thatime at least saying that sanctions, or some action could be forthcoming. we want to take you through what happened after that, and the timeline that leads from that announcement by president obama in december to the resignation late last night of michael flynn as president trump's national security advisor. this is the saga that led to that moment last night. president obama had the press conference two weeks later, he announces new sanctions against russia because of at least in part of because of what he said was meddling in the u.s. election. that's december 29th, crucially, december 29th, that is the same day that flynn had his conversation, phone conversation with the russian ambassador. this was announced, that phone conversation, same day. what happened next? next day, december 30th, word from russia comes, vladimir putin says, there will be no retaliation against the united states for these new sanctions.