Homelessness is a big problem in Canada. Thousands of Canadians spend their nights on the street or in homeless shelters. But what is it really like not to have a place to call home? In this News in Review story CBC reporter Mark Kelley tries to find out by spending seven days as a homeless person in Montreal. We'll follow him as he spends his nights in a shelter, meets other homeless people and tries to figure out what can be done to help them.