Article Photos: WHY IT MATTERS: Issues at stake in election 9/40

  FILE - In this April 19, 2011, file photo, a member of the National Guard checks on his colleague inside a Border Patrol Skybox near the Hidalgo International Bridge in Hidalgo, Texas. Illegal immigration has slowed in recent years, with the Border Patrol recently recording the fewest arrests in almost 40 years. But many people worry that the Mexican border, the most popular crossing point for newly arriving illegal immigrants, still isn’t secure more than a decade after the Sept. 11, 2001, terrorist attacks. (AP Photo/Delcia Lopez, File)