U.S. Vice President Mike Pence warned Turkey on Wednesday against buying a Russian S-400 anti-missile system, keeping up the pressure on its NATO ally to abandon the purchase that Washington considers a threat to U.S. military equipment. “Turkey must choose. Does it want to remain a...

Germans with a second nationality who fight abroad for groups like Islamic State will lose their citizenship, the cabinet agreed in a draft law on Wednesday intended to deter future militants. Like other Western countries, Germany faces a conundrum of how to deal with citizens who travel to...

U.S. President Donald Trump said on Tuesday his pressure on NATO nations to pay more for their defense is leading to tens of billions of dollars more in contributions, but the allies may need to boost their budgets even more. Trump used a well-worn script about burden-sharing with NATO...

A deal to buy Russian missiles has left Turkish President Recep Tayyip Erdogan balancing NATO ally the United States and new regional partner Russia as he risks fallout from both Washington and Moscow. Turkey's already soured relations with the United States could be significantly damaged...