 In the late 1990s, L-3 Communications developed a competing computerized tomography system that also met FAA approval, however it was not TSA Qualified until late 2002.In November 1999, the FAA awarded a contract worth up to US$75 million to L-3 to purchase up to 60 of its explosive detection systems.The eXaminer 3DX 6000 explosive detection system developed by L-3 operates similarly to the CTX system.