Jessica Allen still has to fight back tears when talking about the explosion in Afghanistan that left her husband without both his legs.“For my girls, it’s hard to imagine what it’s like to have your dad 6 feet tall and dressed in camouflage and going out to protect our country and then two months later I have to tell them daddy stepped on a bomb,” said Jessica. “They were in kindergarten and third grade at the time. And the worst part was when they asked me questions about it, mommy didn’t have the answers.”Allen told those memories Wednesday morning during a Veterans Day program at Centertown Elementary where both her girls now attend.