President Biden announced major steps toward decriminalizing marijuana possession Thursday, offering mass pardons for anyone convicted of a federal crime for simply possessing the drug, and urging governors to do the same. He also directed his administration to expedite a review of whether marijuana should continue to be listed as a Schedule I substance, a classification reserved for the most dangerous drugs, including heroin, LSD and ecstasy. "Too many lives have been upended because of our failed approach to marijuana," Biden said in a video statement. "It's time that we right these wrongs." He added: "There are thousands of people who were convicted for marijuana possession who may be denied ... opportunities as a result." While no one is currently serving time in federal prison solely for the crime of simple marijuana possession, officials said, about 6,500 people have such convictions on their records. Those convictions would be pardoned, and the offenders' records cleared, under an administrative process. Thousands of additional people who are residents of the District, which is subject to federal law, could also be pardoned, officials said. Others affected could be those arrested in places such as airports and federal parks, which are under federal law enforcement jurisdiction. Biden's actions, however, do not directly affect the vast majority of marijuana-related convictions, which are pursued under state law.