Today's announcement that the federal government apprehended an alleged al Qaeda operative who reportedly planned to attack a U.S. target with a radiological device is a wake-up call for tighter controls on radioactive material, according to Rep. Edward Markey (D-MA). "This announcement is the latest piece of evidence that al Qaeda is intent on building homemade dirty bombs for use against Americans," the lawmaker, co-chairman of the Bipartisan Task Force on Nonproliferation, said in a statement The suspect is a...