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See the XQ-67A combat drone's first flight as the US Air Force works to build its fleet of manned...
Business Insider· 36 minutes agoThis story is available exclusively to Business Insider subscribers. Become an Insider and start...
It's Time to Clean Your Window AC. Here's How
CNET· 45 minutes agoChanging the filter on a regular basis is the most important factor in keeping an AC giving as much...