In the fall of 2016, a series of U.S. diplomats began suffering unexplained losses of hearing, according to officials with knowledge of the case. Attacking Canadian diplomats would be an inexplicable assault on one of Cuba's most important trading partners and the largest source of tourists to the island. "There'd be no logic to the Cubans trying to deliberately harm U.S. or Canadian diplomats," said William LeoGrande, an American University expert on Cuban foreign policy. In addition to harassment, Caulfield said U.S. diplomats in Cuba are under 24-hour surveillance during their assignments. Caulfield said aggressive tactics largely stopped by late 2013 and 2014 as U.S. and Cuban officials secretly negotiated the diplomatic reopening announced in December 2014, after his departure from Havana.

Source: ABC News August 12, 2017 03:56 UTC