This week, Congress passed a bill that would tighten security on those who travel to the U.S. under the Visa Waiver Program. Currently there are 38 countries that are part of the VWP, which means that citizens of those countries can enter the U.S. without a visa, for up to 90 days. The program still exists, but more measures will be taken to to close security gaps that will prevent dangerous individuals from entering the U.S.
http://www.reuters.com/article/us-usa-security-visas-idUSKBN0TR2VN20151209#4gvvZs7FTsMPEUuL.97
