Suspected threats in flights have allegedly halted travel in 2 airports in the United States. A bomb investigation team has been on high alert stop a possible threat against a Delta Airlines airplane at George Bush Intercontinental Airport in Houston, Texas on Tuesday morning. No threatening devices, though, have been discovered in the plane. Thus, the flight left the airport without any incident.

It was unclear though, which flight number was the Delta plane was, according to CNbc.com. On the other hand, at a later time of the day, a Houston to Los Angeles flight has had its disembarking gate moved to a remote gate after it landed due to suspected terrorist attack. It was alleged that the suspected threat investigated in the plane was unknown, according to airport spokesman Charles Pannunzio. Police, K-9 dogs and the Los Angeles Fire Department were dispatched to the investigated scene. The said flight was allegedly Compass Airlines flight 5931, according to the FBI.

Passengers were said to have disembarked from the Compass flight at 9:56 a.m. , California time. The FBI said in an official statement that:

"While an assessment is always conducted following a threat, there is no known credible threat to the aircraft or passengers at this time."

Meanwhile, the Transportation Security Administration terminated its security head this week. The reason for termination was that the security head was seeking to take the planning of the system into a different direction, as reported in USA Today. This announcement was made by  TSA Administrator Peter Neffenger  on Tuesday.

Neffenger shared in a statement his reasons for terminating TSA's security head, as reported in USA Today. He said:

"Given the specifics of daily volume, I felt it was important to have a different management approach going forward than we've had in the past."

Neffenger was said to be heading to Capitol Hill to discuss new management systems to beat the long lines and enhance the security in U.S. airports, as reported in US News.