Film on US Marine and her combat dog

NEW YORK - One of the best things for Kate Mara about starring in Megan Leavey was Varco the dog.

Varco is the Rex to Mara's Leavey in the true story of a young Marine corporal and her fight to bring her combat dog home after service in Iraq.

"He and I trained together, so by the time we started shooting we were very comfortable with each other," Mara says in a recent interview.