Chances are good that if you're building a model railroad ... For example, there are plate girder bridges with trestle supports allowing them to cross larger gaps than would otherwise be possible ...

"Building Bridges" chronicles 10-weeks in the lives of 12 protestant and catholic students from Ireland and Northern Ireland as they come to Montana to work on Habitat for Humanity projects.

Building Bridges: Back to Ireland is available to stream on pbs.org and the free PBS App, available on iPhone, Apple TV, Android TV, Android smartphones, Amazon Fire TV, Amazon Fire Tablet ...