Pennsylvania has become the 24th state to legalize a comprehensive medical marijuana program. Democratic Governor Tom Wolf signed the bill into law yesterday afternoon surrounded by a jubilant crowd of supporters at the Capitol. The bill’s drafters say it could take two years to write regulations and get retailers opened. But a provision allows parents to legally administer medical marijuana to their children before the bill takes effect in a month. Patients could take marijuana in pill, oil, vapor, ointment or liquid form, but would not be able to legally obtain marijuana to smoke or grow.