washington u.s. vice president joe biden leave five-day trip middle east late saturday major breakthroughs israeli-palestinian conflict expect visit white house official say friday senior white house official tell reporters friday biden would make major recommendations israeli-palestininan issue would focus increase cooperation number issue include fight islamic state syrian conflict biden trip include visit unite arab emirates israel west bank jordan trip biden meet israeli prime minister benjamin netanyahu jerusalem palestinian president mahmoud abbas ramallah white house say biden also meet jordan king abdullah amman white house say early u.s. vice president biden depart five-day middle eastern trip