President Barack Obama said Saturday he authorized the attempt to rescue American Luke Somers in Yemen because the U.S. had information that the American photojournalist’s life was in imminent danger. Shortly before the White House statement, Yemen’s national security chief said militants had planned to kill Somers on Saturday. […] The president said he “strongly condemns the barbaric murder of Luke Somers at the hands of al-Qaida terrorists” and reaffirmed that the U.S. “will spare no effort to use all its military, intelligence and diplomatic capabilities to bring Americans home safely, wherever they are located.” Obama said terrorists “who seek...