As daily cannabis use rises to historic levels in the U.S., some longtime users are finding it harder to quit. Once celebrated as a safe alternative to alcohol or a tool for relaxation and healing, marijuana has quietly become a source of dependence for many …

BROOKLINE, Mass. (AP) For the past several years, 75-year-old Miguel Laboy has smoked a joint with his coffee every morning. He tells himself he wont start tomorrow the same way, but he usually does….