Viktor Bout was arrested in Bangkok in 2008 during a sting operation set by the US Drug Enforcement Agency posing as FARC rebels. This is why he can be charged with conspiring to kill Americans, since US military personnel are engaged in the fight against FARC in support of Colombian security forces. Bout is suspected of previous dealings with FARC and may have other South American links. The US government wants to cut off FARC’s supplies of arms.