In the old days, building a quadcopter or drone required a lot of hacking together of various components from the motors to the batteries and even the control software. Not so much anymore, with qu… ...

A quadcopter however, uses four motors connected to four fixed-pitch props. They are literally propellers attached directly to motors, a sum total of a single moving part for each of the four props.

The quadcopter is what many Palestinians in the Gaza Strip call a small sniper drone with a gun attached that can fire single bullets. Over the past five months, NPR has collected accounts about ...