A pro-marijuana group lost its legal battle when a federal appellate court ruled that marijuana would remain a Schedule I drug, defined as having no accepted medical value and a high potential for abuse. For years, the U.S. Drug Enforcement Administration and the National Institute for Drug Abuse have made it all but impossible to develop a robust body of research on the medical uses of marijuana. For a muscular agency that combats vicious drug criminals, the DEA acts like a terrified and obstinate toddler when it comes to basic science.