Assassination attempts and plots on the president of the United States have been numerous, ranging from the early 19th century to the 2010s. Four sitting presidents have been killed: Abraham Lincoln (1865, by John Wilkes Booth), James A. Garfield (1881, by Charles J. Guiteau), William McKinley (1901, by Leon Czolgosz), and John F. Kennedy (1963, by Lee Harvey Oswald). Additionally, two presidents have been injured in attempted assassinations: Theodore Roosevelt (1912 [former president at the time], by John Flammang Schrank) and Ronald Reagan (1981, by John Hinckley Jr.). In all of these cases, the attack weapon used was a firearm.