Fda's lacking key authority. it can't force a recall of pharmaceutical drugs. even if they catch tainted drugs at the border, they can't seize or impound or destroy the drugs. so ultimately, it falls on the u.s. drug company to be the last resort. pharma, which represents big drug firms, says they follow manufacturing practices. >> they are required to test the drug be it from china or anywhere else. >> reporter: that system relies on u.s. manufacturers to catch problems. most of the time they do. but heprin slipped through the cracks and the results were deadly. in the case of heprin, that is...