President Donald Trump said he doesn’t know “what the hell happened” to Russian President Vladimir Putin, as Russia launched its largest aerial attack against Ukraine overnight, and that he is “not happy with what Putin is doing.

President Trump told cadets in a commencement address at the United States Military Academy at West Point on Saturday that they were the first graduates to serve in a “golden age” of the nation that was a result of his efforts to rebuild the military and reshape American society.