Dana says the house is quieter since Christopher's death. And she says the grief comes bubbling up at times when she doesn't expect it.
"Even just getting on the plane yesterday, it was so funny because we were turning off our cell phones and I had a moment where I thought, 'Oh, we better call Daddy to let him know that we're on the plane,'" she says. "And I thought, 'Well, that hasn't happened in a while,' and I sort of found myself missing him then.
"You have to just let [the grief] come and acknowledge it," she adds. "And most of the time I think we're really pretty positive and optimistic and we're so lucky to have the life that we have and had with him. But it comes from little places. Little triggers that you don't expect. Little reminders."