A <a href="https://en.wikipedia.org/wiki/pushback" class="extiw" title="w:pushback">pushback</a> tractor attached to the front wheel of a <a href="//commons.wikimedia.org/wiki/Boeing_777" title="Boeing 777">Boeing 777</a>. The vehicle is used to push the airplane out from the gate, before it starts taxiing on its own power. See <a href="//commons.wikimedia.org/wiki/File:Denver_International_Airport,_United_Airlines_Boeing_777_being_serviced.jpg" title="File:Denver International Airport, United Airlines Boeing 777 being serviced.jpg">Image:Denver International Airport, United Airlines Boeing 777 being serviced.jpg</a> for a wider-view photo taken at the same time, from nearly the same angle.
<a href="//commons.wikimedia.org/wiki/User:Dbenbenn" title="User:Dbenbenn">David Benbennick</a> took this photograph Friday, April 22, 2005 at 9:49 AM (local time).
CC BY-SA 3.0
<span class="int-own-work" lang="en">Own work</span>