Foreign ICSR fighters

This world map gives insights as to where the 20,000 foreign ICSR fighters are flying into to Syria from.  Notice the size of the black arrows corresponding to the percentage of overall fighters.  A visually interesting way to show the concern and urgency of the issue. http://www.washingtonpost.com/world/foreign-fighters-flow-to-syria/2015/01/27/7fa56b70-a631-11e4-a7c2-03d37af98440_graphic.htmlforeignFighters-Jan14-GS