Previously released FBI files document a spate of threats against Ted Kennedy in the weeks after Robert Kennedy's assassination in June 1968, and five years after their older brother, President John F. Kennedy, was killed. Several of the letters appeared to be written in the same hand.
Who were the Louisiana territory explorers? Meriweather Lewis and William Clark led the expedition that explored the Louisiana Territory for the US government. Edit
The Louisiana purchase also led to the eventual acquisition of the Oregon Territory, which allowed the United States to expand to the Pacific Ocean. Although the acquisition of the Louisiana territory at the price of 3 cents an acre is considered one of the high points of Thomas Jefferson's presidency, at the time it was extremely controversial.