629,000 Overstayed Their U.S. Visas Last Year, Homeland Security Says The number is a tiny portion of the estimated 50 million visitors to the country, but the department says the breach presents a risk to national security. Share: Facebook Twitter Google+ Stumble Digg Email ThisBlogThis!Share to XShare to Facebook Related Posts:Venezuelans Protest Pork Shortages in Latest Sign of DiscontentFacebook Removes Chechen Strongman’s Accounts, Raising Policy QuestionsIranians Protest Rising Food PricesBrazil President’s Christmas Decree Draws a Firestorm, and a RebuffSouth Korea Seizes Ship Suspected of Sending Oil to North KoreaAfghanistan, Roy Moore, Property Taxes: Your Thursday Evening Briefing