Based on facts, either observed and verified firsthand by the reporter, or reported and verified from knowledgeable sources. Ukraine's air force on Sunday confirmed that a third Ukrainian F-16 fighter pilot had been killed in action, a unwelcome blow for a military with a limited number of fourth-generation Western jets and a small pool of pilots trained to fly them. Lieutenant Colonel Maksym Ustimenko intercepted seven incoming Russian air targets in his F-16 jet before his aircraft was...