Hayek supported Britain in the Falklands War, writing that it would be justified to attack Argentinian territory instead of just defending the islands, which earned him a lot of criticism in Argentina, a country which he also visited several times. He was also displeased by the weak response of the United States to the Iran hostage crisis, claiming that an ultimatum should be issued and Iran bombed if they do not comply. He supported Ronald Reagan's decision to keep high defence spending, believing that a strong US military is a guarantee of world peace and necessary to keep the Soviet Union under control. President Reagan listed Hayek as among the two or three people who most influenced his philosophy and welcomed him to the White House as a special guest. Senator Barry Goldwater listed Hayek as his favourite political philosopher and congressman Jack Kemp named him an inspiration for his political career.