COMBAT!
'(<a href="http://www.j-archive.com/media/2007-11-23_DJ_10.jpg" target="_blank">Jimmy demonstrates a souvenir you can't take on the plane</a>) The folding Filipino fighting knife, called a <a href="http://www.j-archive.com/media/2007-11-23_DJ_10a.jpg" target="_blank">balisong</a> is also known by this insect name'
a butterfly knife