Underground network readies homes to hide undocumented immigrants

A hammer pounds away in the living room of a middle class home. A sanding machine smoothes the grain of the wood floor in the dining room.

But this home Pastor Ada Valiente is showing off in Los Angeles, with its refurbished floors, is no ordinary home.

"It would be three families we host here," Valiente says.

By "host," she means provide refuge to people who may be sought by US Immigration and Customs Enforcement, known as ICE. The families staying here would be undocumented immigrants, fearing an ICE raid and possible deportation.