Washington, Apr 5 (Reporter) The United States is very concerned about a potential full-scale war between Israel and Iran following an Israeli strike on an Iranian diplomatic facility in Damascus, White House National Security Communications Adviser John Kirby said during an interview with Fox News. "Yeah, we're very concerned," Kirby said on Thursday regarding Iranian threats of retaliation against Israel. "In fact, one of the things that the [Israeli] prime minister and the President [Joe Biden] talked about today was this very public, very real threat by Iran to the state of Israel...////...