The U.S. Senate Appropriations Committee on Thursday approved an amendment to the Military Construction and Veterans Affairs Appropriations bill that is intended to ease access to medical marijuana for veterans suffering from post-traumatic stress disorder, serious injuries, and other debilitating conditions. The amendment, authored by Sens. Steve Daines (R-MT) and Jeff Merkley (D-OR), would prohibit the spending of funds on enforcement of a Veterans Health Administration directive that prohibits…