14. Sources Flickr.com http://www.flickr.com/photos/altus/1046160728/ http://www.flickr.com/photos/konaboy/51666945/ http://www.flickr.com/photos/altus/1031997659/ http://www.flickr.com/photos/soulo/29858073/ http://www.flickr.com/photos/63092108@N00/196751519/ http://www.flickr.com/photos/pinkertons/76296916/ http://www.flickr.com/photos/altus/182306932/ http://www.flickr.com/photos/bdf/330794079/ http://www.flickr.com/photos/hawaiianbeach/10079385/ http://www.flickr.com/photos/timothysschenck/160559353/ http://www.flickr.com/photos/mureena/1797896739/ http://www.flickr.com/photos/shutterberry/247007258/ Iowaaeaonline.org http://schools.clipart.com/search/close-up?oid=5087056&q=airport&s=1&a=p&cid=&k_mode=all&k_exc=&q_jpeg=1&q_color=1&q_bw=1&date=&isadv=1