the not as appealing parts of the city. and as shasta darlington explains, some residents of rio's shantytowns are being pressured to leave. >> reporter: some walls are left standing but the roof is gone. homes demolished to make way for the 2016 olympics. here in the shantytown some 50 families have simply refused to go. "we work as doormen and security guards," he says. "we spend everything we have on our houses." francisco invites us into his home. he says he built it brick by brick over the last 12 years. now an oasis. amid crumbled buildings and sewage running across the streets. they occupy a tiny corner of what will be the 20126 olympic park. right next door apartment blocks for athletes going up. residents tell us officials