Doubts Rise About Evidence That U.S. Diplomats In Cuba Were Attacked

The claim was extraordinary.

More than 20 U.S. diplomats in Cuba had "suffered significant injuries" in a series of attacks that seemed to target the brain. Or at least that's what State Department officials told reporters during a briefing in September 2017.

A couple of weeks later, President Trump went even further. "I do believe Cuba is responsible," he said during a Rose Garden news conference.

By that time, the U.S. had pulled most staff members from its embassy in Havana and had advised U.S. citizens to avoid traveling to Cuba.

Nearly two years later, the State Department maintains that attacks did occur and that people associated with the embassy in Havana were injured.

But a number of prominent scientists are now challenging that assertion.

There is "no evidence" of an attack, says , a professor of human cognitive neuroscience at the University of Edinburgh in the U.K. "There