Drug trafficking, drug consumption, and their concomitants are major public health and international health problems. The United Nations Office on Drugs and Crime (UNODC) estimates that of the current global population of 7 billion people, about 230 million uses an illegal drug at least once annually. The modern "war on drugs" is usually attributed to Richard Nixon. On June 17, 1971, Nixon declared that drug addiction was "public enemy number one" and asserted that drug addiction had assumed the dimensions of a national emergency. Bill Clinton's administration devoted less attention to federal drug control, but did not cut back on the stringent drug policies he inherited from Reagan and George H. W. Bush. Plan Colombia and the Mérida Initiative are two major treaties that attempt to control and restrict drug trafficking in the USA, Mexico, and Central America.