 President Joe Biden will host a high-stakes NATO summit in Washington this week to mark the 75th anniversary of the alliance. National Security Council spokesman John Kirby said NATO is stronger due to Biden's leadership over the last three years, noting the addition of Finland and Sweden. And a United flight out of Los Angeles Monday morning lost its landing gear tire as it took off. The Boeing 757 continued on to Denver, where it managed to land without incident. The landing gear has several tires, letting it land safely if it loses just one.