The marijuana legalization debate returns to the Granite State. Advocates have been trying to legalize pot here for years, and this session, lawmakers are again taking up the issue. On Tuesday, we examine the arguments. Advocates say legalization could lead to a decline in the use of more dangerous drugs. But opponents warn of unintended consequences, including the impact on babies born to mothers who consume cannabis while pregnant. We'll also examine the broader context, as New Hampshire's three neighboring states have all legalized.