Sammy Yap feels the pain.

"I didn't lose anyone on the flight," he said. "But you can't help but feel for all the families who have lost loved ones ... people you hugged and said goodbye to at the airport that night or were waiting at the other end to greet them. The fact they never walked through the arrivals hall that morning must have been devastating.

"I feel for every single one ... their pain, their loss, and not knowing what happened."