A young journalist was killed last night during a riot in Northern Ireland. Her death is highlighting tensions along the Irish border. And it comes on the anniversary of a decades-old agreement that’s now at risk. Because Brexit. Then - tomorrow is 4/20. And support for marijuana is at an all-time high. But not everyone’s stoked. Also on today’s show: a Seder with a guest list in the thousands, and a place where dancing is illegal for one night only.