FBI uncovers 1983 plot to assassinate Queen Elizabeth II during US visit

Newly released FBI documents reveal that Queen Elizabeth II faced a potential assassination threat during her visit to the United States in 1983. The documents show that a man claimed he would attempt to harm the Queen by dropping an object off the Golden Gate Bridge onto the Royal Yacht Britannia or by killing her when she visited Yosemite National Park. The FBI worked closely with the US Secret Service to prepare for the Queen's visits and monitored possible threats from the Irish Republican Army and its sympathizers.