helicopters http://kalw.org en What's up with the whirlybirds?! http://kalw.org/post/whats-whirlybirds <p>Maybe you've just seen <em>The Bourne Legacy</em>&nbsp;and have nagging feeling that you're being watched at all times. Maybe you related a little too much to <em>Close Encounters of the Third Kind</em>. So if you see low-flying helicopters crisscrossing the skies this week, you might think the government is after you, or that the aliens have finally arrived. But the more likely explanation is that you've caught a glimpse of the federal effort to measure "naturally occurring&nbsp;background radiation."</p> Wed, 29 Aug 2012 01:00:00 +0000 Ninna Gaensler-Debs 15859 at http://kalw.org What's up with the whirlybirds?!