Dennis Quaid's Quest

"There's a reason that flying on a commercial airliner today is safer than walking," Quaid explains. "It's because when an accident happens, the NTSB makes a determination about what happened. Airline executives know they need to solve the problem quickly, whether it's a change in design or a new piece of technology, or people aren't going to fly their airline."

T. Boone and Z.G. are nearly 3 now and show no signs of lasting damage from the overdose. After nearly losing them, their parents make family time a priority, as the jungle gym, the tricycles, the toys, and the playhouse in the yard of their home suggest. In the twins' honor, Quaid will continue to speak out about medical errors. "And Kimberly is just as much a part of that," he says. "I go out and give speeches, and she holds down the fort." When T. Boone and Z.G. are older, the couple will tell them what they went through. "This is their legacy," Quaid says. "They're really tough, and they should be proud. Because of what happened to them, they already have saved lives."