 Whatever you're thinking, either tell somebody privately, but you don't have to put that out on the table until we see how we go this week. Biden's performance is under scrutiny, though, as he hosts more than 30 heads of state in Washington. Ukraine's fight with Russia remains front and center at the summit. Secretary of State Antony Blinken says NATO is sending F-16s to Ukraine, part of a package that he says will be key to defending Ukraine's infrastructure. Here's NPR's Michelle Kellerman.