The C.I.A. is stepping up efforts to confront the cause and effects of mysterious sonic incidents, believed to be attacks, that have injured U.S. officials, by increasing medical staff and assigning an agency veteran who hunted Osama bin Laden, the agency’s director, William J. Burns, said in an interview on Thursday.“I’m certainly persuaded that what our officers and some family members, as well as other U.S. government employees, have experienced is real and it’s serious,” Mr. Burns told NPR in his first interview since taking over the C.I.A. three months …
