The United States is the world leader in regime change, toppling 35 foreign heads over the past 120 years, by one reckoning. Overthrowing another country's leader is a routine enough tactic that it has its own acronym among academics: FIRC, or foreign-imposed regime change. According to a tally by Alexander Downes, an associate professor and political scientist at George Washington University ... the United States carried out nearly a third of all of about 120 forced ousters of foreign leaders around the world between 1816 and 2011. About 20 of those 35 U.S.-backed regime changes were in Central and South America or the Caribbean. In some of those countries, the United States removed and replaced leaders again and again, with the concentration of someone kicking a vending machine to get the right candy bar to drop. In 1954 alone, for example, Washington ousted three Guatemalan leaders in succession. Globally, a third of all forced regime changes by all countries led to civil wars in the targeted nation within 10 years. Experts see warning signs for any attempt at regime change in Venezuela, a petrostate where misgovernment by socialist autocrat Maduro and his predecessor Hugo Chavez, coupled with international sanctions, have trashed the economy and created millions of refugees. The Trump administration has accused Maduro of being in league with drug traffickers, although the United States overstates Venezuela's role in drug smuggling.