Khalid Masood Identified as London Parliament Attacker

The knife-wielding terrorist who killed an American tourist and three others outside the U.K. Parliament was British-born and previously investigated for "violent extremism."  Police identified the suspect as Khalid Masood, 52, on Thursday.  He was known by a number of aliases, police said. Kurt Cochran, 54, who lives in Utah, was among the three slain, Church of Jesus Christ of Latter-day Saints spokesman Eric Hawkins told NBC News. His wife Melissa, whose parents are currently serving as missionaries in London, was also injured. They were celebrating their 25th wedding anniversary. The others killed were a police officer, a mother-of-two who was hit by a bus as she ran from the attack, and a 75-year-old man who had been receiving medical treatment at a hospital. Police said the elderly man died Thursday night after life support was withdrawn.