If the bill is vetoed, it goes back to Congress, which can override the veto with a two-thirds vote in both houses. Veto overrides are rare—it is extremely difficult to get two-thirds of each house of Congress to agree to override. Instead, presidential vetoes usually kill bills.
Instituted in the hope of avoiding war, appeasement was the name given to Britain's policy in the 1930s of allowing Hitler to expand German territory unchecked.
