It's been two days since a Malaysia Airline plane vanished. More than 200 passengers were on board, including several Americans.
Investigators from the FAA and the NTSB have arrived in Malaysia Monday morning. Authorities there say they will meet with them as soon as possible to see how the Americans can help try to find out what happened to Malaysian airlines flight MH370.
Vietnamese navy planes spotted possible fragments from the flight in the sea off Vietnam. But Monday morning, officials from the country say they have yet to locate the debris.
The plane was carrying 239 people when it vanished. Military radar suggests the pilots may have turned back without warning. Up to four passengers with questionable identification were on board, including two people who used stolen passports.
Officials are not ruling out terrorism.
The families of Chinese passengers on board are demanding answers and applying for visas and expedited passports to travel to where the doomed flight took off.
A man with ties to Oklahoma, Philip Wood, was on board that plane. The family of Philip Wood says he is an executive with IBM and recently moved from North Texas to Malaysia.
In 1985, he graduated from Oklahoma Christian University with a degree in math and computer science.
The family is clinging to their faith and leaning on their church family in Keller, Texas. His brother Tom says not knowing where Wood is is the hardest part right now.
Wood's brother says if the flight was hijacked, that would actually be better news than if the plane went down because there's a possibility he could be alive.
The executive vice president of Oklahoma Christian University issued a statement on Sunday. Bill Goad said, "The Oklahoma Christian University community was shocked and saddened to learn yesterday that Philip was on this flight. The thoughts and prayers of his many friends in the OC community are with the family at this time."