largest producer of cocaine and is the origin of approximately 92% of the cocaine's seized in the u.s. this week u.s. ambassador to the u.n. nikki haley is in colombia and touring drug interdiction efforts. correspondent rich edson is traveling with the ambassador and reports from bogota. >> the director of colombia's antinarcotics police just told u.n. ambassador nikki haley cocaine production will increase here as she watches police destroy coca crops. >> this is where it comes from. we are at the source of where all of it comes from. we have to go to the source and cut the supply. >> u.s. has spent millions over the last decade and and a half to. colombia coca cultivation hit all time high. robust demand for drugs in the u.s. keeps cocaine production and trafficking a multi-billion-dollar industry here. counter narcotics forces face overwhelming challenges. coca yields are resilient