List of Nations the US has bombed since 1950. Wow. (self.politics)
Korea and China 1950-53 (Korean War)
Guatemala 1954
Indonesia 1958
Cuba 1959-1961
Guatemala 1960
Congo 1964
Laos 1964-73
Vietnam 1961-73
Cambodia 1969-70
Guatemala 1967-69
Grenada 1983
Lebanon 1983, 1984 (both Lebanese and Syrian targets)
Libya 1986
El Salvador 1980s
Nicaragua 1980s
Iran 1987
Panama 1989
Iraq 1991 (Persian Gulf War)
Kuwait 1991
Somalia 1993
Bosnia 1994, 1995
Sudan 1998
Afghanistan 1998
Yugoslavia 1999
Yemen 2002
Iraq 1991-2003 (US/UK on regular basis)
Iraq 2003-present
Afghanistan 2001-present
Pakistan 2007-present
That's a pretty serious list.
EDIT: And Somalia in the 2000s (thanks BeanTownKid)
here's a resumed list of CIA actions, of course that this agency is not the sole responsible for this list. But we live in a world where politics are dictated by money, and every coup received a IMF dollars bomb, just this is enough to make the balance to shift to one side, to not to say about US military and intelligence
1947: Greece (military aid to Greece to support right-wing forces)
1948: Italy (CIA corrupts democratic elections)
1953: Iran (CIA overthrows the democratically elected Mohammed Mossadegh in a military coup)
1954: Guatemala (CIA overthrows the democratically elected Jacob Arbenz in a military coup)
1954-1958: North Vietnam (CIA's continuing failure results in escalating American intervention and finally the Vietnam War)
1956: Hungary (Radio Free Europe incites Hungary to revolt by broadcasting Khruschev's Secret Speech, The conflict kills 7,000 Soviets and 30,000 Hungarians)
1957-1973: Laos (CIA carries out approximately one coup per year trying to nullify Laos' democratic elections)
1959: Haiti (U.S. military helps "Papa Doc" Duvalier become dictator of Haiti)
1961: Cuba (CIA sends 1,500 Cuban exiles to invade Castro's Cuba)
1961: Dominican Republic (CIA assassinates Rafael Trujillo, a murderous dictator Washington has supported since 1930)
1961: Ecuador (CIA-backed military forces the democratically elected President Jose Velasco to resign)
1961: Congo (CIA assassinates the democratically elected Patrice Lumumba)
1963: Dominican Republic (CIA overthrows the democratically elected Juan Bosch in a military coup)
1963: Ecuador (CIA-backed military coup overthrows President Arosemana)
1964: Brazil (CIA-backed military coup overthrows the democratically elected government of Joao Goulart)
1965: Indonesia (IA overthrows the democratically elected Sukarno with a military coup)
1965: Dominican Republic (A popular rebellion breaks out, promising to reinstall Juan Bosch as the country's elected leader. The revolution is crushed when U.S. Marines land to uphold the military regime by force)
1965: Greece (With the CIA's backing, the king removes George Papandreous as prime minister)
1965: Congo (CIA-backed military coup installs Mobutu Sese Seko as dictator)
1967: Greece (CIA-backed military coup overthrows the government two days before the elections)
1968: Bolivia (CIA-organized military operation captures legendary guerilla Che Guevara)
1969: Uruguay (right-wing forces previously used torture only as a last resort, CIA convinces them to use it as a routine)
1970: Cambodia (CIA overthrows Prince Sihanouk, who is highly popular among Cambodians for keeping them out of the Vietnam War)
1971: Bolivia (CIA-backed military coup overthrows the leftist President Juan Torres)
1971: Haiti ("Papa Doc" Duvalier dies, leaving his 19-year old son "Baby Doc" Duvalier the dictator of Haiti. His son continues his bloody reign with full knowledge of the CIA)
1973: Chile (CIA overthrows and assassinates Salvador Allende)
1975: Australia (CIA helps topple the democratically elected, left-leaning government of Prime Minister Edward Whitlam)
1975: Angola (CIA backs the brutal leader of UNITAS, Jonas Savimbi)
1979: Iran (CIA fails to predict the fall of the Shah of Iran, a longtime CIA puppet, and the rise of Muslim fundamentalists who are furious at the CIA's backing of SAVAK)
1979: El Salvador (military officers, repulsed by the massacres, overthrows the right-wing government. However, the U.S. compels the inexperienced officers to include many of the old guard in key positions in their new government leading to new massacres)
1979: Nicaragua (CIA-backed guerilla war against the Sandinista government throughout the 1980s)
1981: Iran (CIA's Freedom Fighter's Manual disbursed to the Contras includes instruction on economic sabotage, propaganda, extortion, bribery, blackmail, interrogation, torture, murder and political assassination)
1983: Honduras (CIA gives Honduran military officers the Human Resource Exploitation Training)
1986: Haiti (CIA tries to strengthen the military by creating the National Intelligence Service (SIN), which suppresses popular revolt through torture and assassination)
1989: Panama (U.S. invades Panama to overthrow a dictator of its own making, General Manuel Noriega)
Source