Until the upheaval of 2015, Europe was home to the world’s most open frontiers. But within months, a messy effort to halt a mass flow of migrants fleeing wars in Syria, Iraq and Afghanistan cascaded into the construction of more border fences than anywhere else on the globe. For the most part, the once-open door to Europe has closed.

  Read more >

NOGALES, Mexico — A few hundred feet from the American border, José Manuel Talavera contemplated his challenge with the focus, if not quite the physique, of an Olympic high jumper. Read more >

The U.S. Read more >

Last week President Barack Obama hosted a Leaders’ Summit on Refugees as part of his final presidential duties at the United Nations General Assembly. Read more >