by Northrop Grumman refusing to share technical data on the aircraft with which to perform evaluations. On 13 May 2013, German media reported that the EuroHawk would not be certifiable under ICAO rules without an anti-collision system; thus preventing any operations within European airspace or the airspace of any ICAO member. The additional cost of certification was reported to be more than €600 million (US$780 million). On 15 May 2013, the German government announced the immediate termination of the program, attributing the cancellation to the certification issue. Reportedly, the additional cost to develop the EuroHawk to the standards needed for certification may not have guaranteed final approval for certification. German defense minister Thomas de Maizière stated EuroHawk was "very important" for Germany in 2012, then referred to the project as being "a horror without end" in his 2013 statement to the Bundestag. The total cost of the project before it was canceled was €562 million. Northrop Grumman and EADS have described reports of flight control problems and high costs for certification as "inaccurate"; they have stated their intention to provide an affordable plan to complete the first EuroHawk's flight testing and produce the remaining four aircraft. On 8 August 2013, the EuroHawk set an endurance record by flying continuously in European airspace for 25.3 hours, reaching an altitude of . It was the longest flight by an unrefueled UAS weighing more than in European skies. On 5 October 2014, German Minister of Defence Ursula von der Leyen was reportedly considering reactivating the EuroHawk program to test its reconnaissance abilities over a long period at altitudes of up to . Attempting to test the recon system on Airbus aircraft and an Israeli drone as alternate platforms had proven unsuccessful. The Bundeswehr would use it to detect, decrypt, and potentially interfere with enemy communications signals. If tests prove successful, a carrier would be purchased, likely "similar" to the U.S. Global Hawk. Germany is considering installing the EuroHawk's SIGINT payloads onto the U.S. Navy MQ-4C Triton Global Hawk derivative, as the electronic and communications intelligence sensors would be more difficult to place on other substitute aircraft. It already has icing and lightning-strike protection, and was built with certification over civilian airspace in mind, meeting the STANAG 4671 requirements that had ended the EuroHawk program. As of March 2021, Germany plans to put the single RQ-4E aircraft on display in the Bundeswehr Military History