Drones start your engines. NASA and Development Project Inc. have opened registration for the 2014 Unmanned Aircraft Airspace OperationsChallenge. What’s the prize? $500,000 big ones. In April 2014, teams across the nation will compete to meet technology challenges inmaking unmanned aircraft capable of integration into our national airspace. NASA says the challenge is a great way to get the private sector involved in answering tough technology questions and brings a diversity of people together to address the advancement of unmanned flight. But get thoseapps in early! Early registration is $5,000 but jumps to $9,000 with late registration. You can go to uasaoc.org for more info and to register.