&gt;&gt;&gt; ...a small quadrocopter to autonomously recognize and follow forest trails. [...] to accelerate the search for people lost in the wild.<p>If there are trails, then this is boarderline &quot;the wild.&quot;  Lost in parks maybe, but wilderness by definition is off-trail.  I&#x27;d rather see the drone that can search through farmland.  Kids do get lost in cornfields.