US president Donald Trump fired the head of the FBI last week. When he did that, he shocked many people. The FBI is a special organization in the United States that investigates (looks carefully at) problems and issues. The FBI has been investigating an issue that Donald Trump cares about. They have been trying to figure out if some people in Russia influenced the US election, and helped get Trump elected. (No outside country is allowed to affect the results of a US election.)

Source: Trump Fires FBI Director