The U.S. State Department has sent "a number of individuals" from the U.S. Consulate in Guangzhou, China back to the U.S. after screenings showed they may have been affected by mysterious health problems similar to what diplomats experienced in Cuba. Two weeks ago, the agency said one government employee in Guangzhou experienced "vague, but abnormal, sensations of sound and pressure," similar to the unexplained incidents - sometimes described as "sonic attacks" - that recently sickened staffers in Cuba.