On Friday afternoon, President Barack Obama demanded that Russian separatists in eastern Ukraine adhere to a cease fire, and he slammed Russian President Vladimir Putin for not keeping his vow to de-escalate in the Ukraine and for continuing to provide weapons and training to the rebels. Obama confirmed media reports noting that US intelligence has determined that a missile fired from the rebel-held area downed the Malaysian Airlines passenger plane, killing over 300 people. Obama announced that one US citizen was on the flight. Watch the speech here: