Police named the perpetrator of Wednesday's terror attack in London as a 52-year-old British man, Khalid Masood. Kent-born Masood, who died in the attack, was previously known by the British Intelligence, in relation to concerns of violent extremism. More details have emerged from the three people that were killed in the attack. Aysha Frade, 43, was originally from Spain but was working as a teacher in London. Kurt Kochran, a US citizen from Utah, was traveling around Europe with his wife. They were celebrating their 25th wedding anniversary. His wife Melissa was seriously injured in the attack. Keith Palmer, the policeman who was stabbed to death as he guarded the Palace of Westminster, was a 15-year police veteran. His family remembered him as a “wonderful dad and husband, a loving son, brother and uncle.” 29 people are being treated in hospital,