US runner Shelby Houlihan banned for 4 years after failed drug test, blames tainted burrito

US runner Shelby Houlihan banned for 4 years after failed drug test, blames tainted burrito

Shelby Houlihan, who holds the U.S. record in the 1,500 and 5,000 meters, revealed Monday she was banned for four years after testing positive for a banned substance she says was tainted pork in a burrito.