CHIEF Warrant Officer (CWO) Alois Erber, (front), checks the progress on testing the system with fellow Austria team member CWO Peter Horvath, during phase three of COMBINED ENDEAVOR (CE) 2000. CE 2000, currently hosted by Germany, is the largest information and communication systems exercise in the world. This exercise is the sixth in a series of multinational communication interoperability workshops where military personnel from 35 nations get together for 14 days to focus on Command, Control, Communications, and Computers (C4) interoperability testing and documentation and to meet and interact on a personal level