Air Force and Coast Guard aircraft will fly “intercept and identification” exercises over Washington tonight as part of efforts to prevent suicide aircraft attacks or other threats to the capital, a military spokesman said. The latest exercise of what the North American Aerospace Defense Command calls “Falcon Virgo” involves Civil Air Patrol Cessna-182 light aircraft and a Coast Guard HH-65 Dolphin helicopter between 11:30 p.m. Monday and 5:30 a.m. Tuesday, NORAD said in a statement. “We want to make sure people seeing these planes aren’t concerned,” said NORAD spokesman John Cornelio. “One of the reasons we put out notice of...