on one hand, the US is already participating in the war in Colombia. They have a large military base in Manta, Ecuador, from where Awacs planes are taking off to monitor the air space. On the other hand, this war is essentially not so much about drugs as it is an attempt to eliminate the threat posed by the anti-government left wing guerilla.
This is froam an article on Venezuelan fears of a Colombian, US-backed invasion:
"Even mainstream Latin American history books (e.g. A History of Latin America, by Keen and Haynes, Houghton Mifflin, Boston, 2004) state that Plan Colombia is not so much about US anti-drug policy as it is about securing the Colombian oil industry that had been under attack by leftist guerrillas. Besides outsourcing the task of taking back control of guerrilla-controlled areas to paramilitary death squads responsible for the slaughter of hundreds, perhaps thousands, of innocents, and providing juicy multimillion dollar contracts to US companies such as Monsanto and DynCorp, there have been few visible accomplishments for Plan Colombia.
It is not inconceivable that part of Plan Colombia would be to destabilize and overthrow the Chavez government and install puppet leaders to make US access to Venezuelan petroleum resources easier and cheaper."
http://www.vheadline.com/readnews.asp?id=17569http://www.venezuelanalysis.com/articles.php?artno=1162