David says he still visits his sons' graves. "Sometimes it will be 1 in the afternoon, or I find myself out there at 3 in the morning in the rain," he says. "It's just whenever it hits me."
Today Michael and Alex would be 17 and 15, respectively, but David says they'll always be little boys to him. "I try to picture them at different ages and what they'd be doing," he says. "But it always just comes back to 3 and 14 months old. That's the way I remember them."