This drone flies for 48 hours straight

The U.S. Naval Research Laboratory (NRL) recently managed to fly a fuel-cell powered Ion Tiger UAV for 48 hours and 1 minute using liquid hydrogen fuel in a new, NRL-developed, cryogenic fuel storage tank and delivery system.

US Navy wants an autonomous firefighting robot

Scientists at the US Naval Research Laboratory (NRL) have formed an interdisciplinary team to develop a humanoid robot capable of fighting shipboard fires.