As cannabis use becomes more common in social settings, is it time to set some ground rules? Lizzie Post, the great-great-granddaughter of etiquette maven Emily Post, thinks so. In her new book, "Higher Etiquette," Post clears up cannabis-related terminology, the proper ways to pass a joint, and how to host a dinner party where some do, and some don't, partake in an after-meal vape. And we want to hear from you: do you have any burning questions about common cannabis courtesy?

Richard Haass, president of the Council on Foreign Relations, recently described what he calls the "post-American Middle East." Citing the U.S.' withdrawal from Syria and tepid response to Iran's attack on Saudi Arabian oil installations, Haas sees a clear pivot to a reduced role for the U.S. in the Middle East, even without the complete withdrawal of U.S. troops. Haass joins Forum to discuss the Trump administration’s approach to foreign policy in the region.