FBI probes motive for attack on National Guard troops

US investigators led by the FBI's joint terrorism task force are seeking motives for what drove a man to open fire on two National Guard soldiers mere blocks from the White House in what officials called an "ambush" attack on Thanksgiving eve. The two soldiers, part of a militarised law enforcement mission ordered by President Donald Trump months ago and challenged in court by officials of the District of Columbia, are hospitalised in critical condition. The suspect, who was wounded in an exchan