U.S. Air Force biologist Capt. Ashton Carter, from Wright-Patterson Air Force Base, Ohio, demonstrates a prototype of the Seldon Waterbox, a portable water filtration device, during Talisman Sabre 2011. According to Seldon Technologies, the suitcase-sized device they developed under the auspices of the U.S. Air Force can effectively turn any river, lake or stream into a potable water source by removing 99.9999% of bacteria and 99.99% of viruses through its carbon nanotube filtration system. Talisman Sabre 2011 is an exercise designed to train U.S. and Australian forces to plan and conduct combined task force operations to improve combat readiness and interoperability on a variety of missions from conventional conflict to peacekeeping and humanitarian assistance efforts.