customs and border patrol commissioner says the small risk of exposure will now be even lower. >> the expanded screening measures provide this layer of protection to the already-established protocols to minimize the risk of another case of ebola here in the united states. >> reporter: but he warns that no screening measures can get the risk to zero. all passengers leaving the international terminal were given a list of tips for self-monitoring for ebola symptoms. we spoke with some of them. and they were supportive of the extra safeguards. anthony their amsterdam. >> i think there is some justification in taking some measures to try to prevent the disease from entering the stat states. >> reporter: this man from nigeria was dropping off a family member. >> reporter: the c.d.c. says these measures are part of a multi-layer approach to fighting