By AARON BOXERMAN, EUAN WARD, YAN ZHUANG and JOHN ISMAY Iran and the United States traded new attacks and threats Sunday, the fourth straight day of hostilities, with little sign of a de-escalation that would get their 2-week-old ceasefire back on track. Iran’s Revolutionary Guard said in a statement carried by Iranian state media that it had targeted a U.S. naval base in Bahrain and the Ali Al Salem Air Base in Kuwait in retaliation for American attacks. The governments of Kuwait and Bahrain…
