364,000 people came to the U.S. without visa confirmation in 2010, alone.

Editor's notes:  understand that "they" are already here.  40,000 Arabs cross our porous Southern border,  each year, including an unknown number of Muslim Jihadists  . . . .     been doing this for all of Obama's term as "president."  The reason why we have not seen more terror attacks than we have  (San Bernardino was not the first by any means) has everything to do with our national police force  (local and county) and law enforcement,  in general.  Curse the cop who gave you that speeding ticket,  all you want,  but,  in the end,  he is the "red line" in the sand.  Thank gawd we don't have to depend solely on Obama.  The article,  below,  tells you all you need to know as to the effectiveness of his administration when it comes to protecting the homeland.  What a classless jerk he turned out to be.  

WSJ:   At least four of the terrorists involved in last month’s deadly Paris attacks were French citizens. This means that, under the terms of the Visa Waiver Program, they could have legally entered the U.S. with nothing more than their passports. After Paris the Obama administration announced updates to the program, such as better tracking of “past travel to countries constituting a terrorist safe haven” and “fines from $5,000 to $50,000 for air carriers that fail to verify a traveler’s passport data.” These measures aren’t nearly enough.

The Visa Waiver Program allows as many as 20 million citizens from 38 countries—including Japan, Australia and much of Europe—to travel to the U.S. for up to 90 days without the extra layers of security attached to their procuring a visa at a U.S. consulate. The program has encouraged tourism and business that benefit America. It also allows Americans to travel abroad to these countries with minimal hassle.

But the program has two serious security gaps. The first is that the U.S. has become wholly dependent upon the competence and thoroughness of the countries that participate. Visitors’ eligibility for entry under the Visa Waiver Program is determined by the Electronic System for Travel Authorization. But a 2012 audit by the Government Accountability Office found that roughly 364,000 people reached the U.S. in 2010 “without verified ESTA approval.” This security gap, long ignored, has now become enormously important.