These programs are aimed at detecting and intervening against travel and participation in fighting or violence. Although many States had made positive strides recently, much still needs to be done to improve the capacity of both law enforcement and intelligence agencies to identify known or suspected FTFs prior to travel. Unfortunately, a significant proportion of FTFs are not known to authorities before they travel, making it difficult to detect when they enter the international travel system or to provide other States sufficient warning to interdict them en-route. FTFs may travel to destination countries directly or try to disguise their travel by first transiting through third countries.