<human>:  Where is the DARPA challenge?
<bot>: The DARPA challenge is a competition that is taking place in the United States. It is a contest to develop a computer program that can carry out the functions of a military general, including planning, organizing, and commanding military operations. The competition is designed to test the ability of computers to carry out military functions, such as planning and executing combat missions. The contest is open to any student, researcher, or engineer.