The White House on Monday promised to work with Turkey and other NATO allies to hold Syria "accountable" for what American officials have described as the deliberate downing of a Turkish military jet, apparently in international airspace. Turkey said it would push NATO, whose governing body meets Tuesday to discuss the matter, to consider the June 22 incident an attack on the entire alliance. Under Article V of NATO's founding document, an attack on one member is considered an attack on all. "We stand in solidarity with Turkey, a key U.S. ally," spokesman Jay Carney told reporters aboard Air Force...