The New York Police Department has stepped up security near British missions to the United States, as a precaution after the terrorist attack near the Houses of Parliament in London yesterday. This as the White House immediately offered its full support to the British Government in responding to the attack and bringing those responsible to justice. London Metropolitan Police have confirmed that four people died, including a police officer and the assailant, while at least 20 people have injured. Sherwin Bryce-Pease reports.