NEW YORK - Families were anxious at John F. Kennedy International Airport Friday as they waited for travelers to arrive safely.

News of the downed EgyptAir Flight 804 left many people saying they were worried.

"What am I going to do?" asked Vincent Santini, of Yonkers. "You say a prayer and you hope."

Santini was waiting for his son to arrive on a flight from the Dominican Republic.

Investigators have not yet determined whether terrorism or technical failure caused the Airbus A-320 aircraft to crash in the Mediterranean, but TSA officials say it highlights the need for strong airport security.

"It's a stark reminder that what we do is important," says TSA head Peter Neffrenger. "We need to do it well, and we need to do it efficiently."

Security expert Denis Monette says airport security should be tight at all times in the wake of the Sept. 11, 2001 terrorist attacks, as well as more recent ones.

"We can't do security in reaction to an event," Monette says. "We do have to do security to prevent the event."

Port Authority officials say they have not increased security measures, but rather remain vigilant.