The code 7700 is a general emergency signal for aircraft. This is an alert for a missing child that’s used in many public ...

Senior Trump administration officials have been accused of using the third-party app to discuss highly sensitive national security information.

A TASS correspondent reported that the system has displayed information about numerous general emergency signals sent out by Russian passenger flights. However, all the aircraft were in the air in ...

Cell phone signal jammers could help reduce crime coordinated from behind bars. But prisoner advocates say other solutions would be better.