The city of Kherson in southern Ukraine is a key objective for Russia. Its military shells the city's neighborhoods daily and sends drones buzzing over the streets. We go out with a Ukrainian military unit that seeks to disrupt the Russians under

On a shelf in his office at CIA headquarters, Director Bill Burns keeps a tiny scaled model of a house. It's the house in Kabul, Afghanistan, where Al Qaida leader Ayman al-Zawahiri was killed by a U.