Top officials at of The American Legion, the nation’s largest veterans organization, on Friday stepped up their calls for the federal government to legitimize and invest in medical marijuana research.

In a speech to the National Press Club in Washington, D.C., the Legion National Commander Denise Rohan outlined how the White House and Congress could improve the delivery of benefits to the nation’s 20 million-plus veterans. Medical cannabis was on the list.

In fulfilling its mission to make sure veterans are taken care of, “we have to find replacements for the opioid epidemic we have in this nation,” Rohan said.

The organization’s call for additional research into cannabis as a potential treatment for post traumatic stress disorder (PTSD), pain and other ailments was reiterated by Louis Celli, National Director Veterans Affairs & Rehabilitation at the Legion.

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