real effects of immigration. jonathan martin has the story from the u.s.-mexican border. >> this has been the center of a humanitarian effort. each day, busloads of tired and hungry and frightened migrant families make their way to this church. and the only things they have are, there a team of volunteers are waiting. >> they can get an opportunity to take a shower, an opportunity to eat and see a doctor. >> the groups of mainly women with children come in after being detained by border patrol acts. most are from central america x. were caught crossing the border through the rio grand valley. they opened the church after seeing so many undocumented families with nowhere to turn. >> they are being detained by immigration, and they have a permit to travel. so we're not aiding and abetting anybody. we are seeing folks in the community that need care, so