If you're a backpacker you need a reliable yet lightweight method for purifying and filtering water in the wild. Most commercial methods are either bulky and heavy or need supplies such as salt and/or ...
A U.S. Air Force F-16 Fighting Falcon fighter aircraft assigned to the 18th Aggressor Squadron takes off from Eielson Air Force Base, Alaska, Oct. 6, 2014, during RED FLAG-Alaska 15-1. RF-A is a ...
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