An undercover investigation has exposed weaknesses in the federal drug testing system for truck drivers that raise doubts about the overall effectiveness of the program, according to the Government Accountability Office.
John Hill, administrator of FMCSA said...drug testing is important but not at the top...
Undercover investigators were able to use bogus licenses at all of the 24 sites, which shows that a driver could easily send a substitute in with a fake ID, the agency said.
Every drug masking product went undetected by the drug screening labs," the GAO said.
Drug Testing System Is Flawed, GAO Reports http://www.gao.gov/new.items/d08225t.pdf
Drug Testing System Is Flawed, GAO Reports 
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