BALTIMORE, Md. -- Physicians should be required to take continuing education classes on opioid prescribing in order to maintain their Drug Enforcement Administration (DEA) prescribing licenses, New Jersey Governor Chris Christie (R) said Tuesday at a congressional field hearing here on the opioid crisis. "This drug epidemic didn't start on the street corners of Baltimore; it started in doctors' offices and hospitals across the nation," Christie, who led President Trump's commission on the opioid crisis, said at the House Oversight and Government Reform Committee hearing at Johns Hopkins Hospital. "And while some of it is done by folks who have bad intent, most is done by those with no intent. Why no intent? Because they're not educated on this issue."