Within the next few days, Germany will have to decide whether to pump additional funds into its Euro Hawk program to keep flying its sole demonstrator unmanned aircraft, or stop flying the airplane. German officials have been testing out the signals intelligence (SIGINT) sensor package they designed and installed on the Northrop Grumman-made demonstrator aircraft, flying it at high altitudes over the country, according to an industry source familiar with the Euro Hawk program. That flight testing has been possible...