If you’re coming to PyCon , which takes place in Montréal, Quebec, Canada from April 9 through 17, you need a passport if you are a US citizen . If you’re coming to PyCon from any other country, you already needed a passport, but you probably already knew that :) This wasn’t always the case, as Americans and Canadians used to cross the border with ease. I once had delicious ice cream at Twist o’ the Mist in Niagara Falls, NY after a day on the Canadian side, and it was delicious, and I didn’t have a passport. However, on June 1, 2009, the Western Hemisphere Travel Initiative was enacted, making it a requirement that a passport must be shown to enter the United States, which in turn made it a requirement to have a passport to enter Canada. If you are traveling by air between the US and Canada: you need a passport book. If you are traveling by land between the US and Canada: you can have a passport book or a passport card. If you are traveling by sea between the US and Can...