On 24 April 2001, a Global Hawk flew non-stop from Edwards AFB to RAAF Base Edinburgh, covering 13,219 kilometers (8,214 miles) in 22 hours — becoming the first pilotless aircraft to cross the Pacific Ocean and setting a world record for absolute distance flown by a UAV. The prototype aircraft were so urgently needed for reconnaissance over Afghanistan that they entered operational service while still in development, an unusual step that underscored their revolutionary value. Later variants — the RQ-4B Block 20, Block 30, and Block 40 — added signals intelligence, communications relay, and advanced radar capabilities. The Global Hawk demonstrated that unmanned systems were not merely tactical tools but strategic assets, capable of spanning oceans and sustaining operations that would exhaust human crews.