LINDA WERTHEIMER, HOST:
Marital fidelity is a sensitive subject for many in the military. Relationships are often strained by distance, frequent moves, the dangers of war. Gen. David Petraeus' admission that he had an extramarital affair has led some military families to reflect on the difficulties of keeping their personal relationships whole. Reporter Joanna Richards spoke with families from the Army's 10th Mountain Division, based at Fort Drum, in upstate New York.