Associated Press journalists recently visited the rebels at four different camps on the condition they not reveal the precise locations because of security concerns. A 1964 military attack on their main encampment led to the creation of the Revolutionary Armed Forces of Colombia, or FARC. The FARC lost popularity as it turned to kidnapping, extortion and taxes on cocaine production and illegal gold mining to fund its insurgency. In 2000, the United States began sending billions of dollars for counter-narcotics and -insurgency efforts under Plan Colombia, which helped security forces weaken the FARC and kill several top commanders. Accords have also been reached on land reform, combatting drug trafficking, the guerrillas' political participation and punishing war crimes on both sides.