Why do birds fly in a V? Science may now have an answer. (+video) - CSMonitor.com

http://www.csmonitor.com/Science/2014/0115/Why-do-birds-fly-in-a-V-Science-may-now-have-an-answer.-video?utm_source=Sailthru&utm_medium=email&utm_term=Science_final&utm_campaign=20140116_Newsletter%3AScience_Sailthru&cmpid=ema%3Anws%3AScience%2520Weekly%2520%2801%2F16%2F2014%29