US Navy, Air Force, ground, intelligence and special forces units based at home, in Europe and the Middle East, took part this week in a special exercise ordered by President Barack Obama to simulate reactions to a potential US/Israel strike on Iran’s nuclear facilities, DEBKAfile reports. Advanced US stealth F-22 fighter bombers were also transferred to the Al Dhafra Air Base in the UAE. Washington is thinking of attacking core elements of Iran’s nuclear program to weaken its hand in negotiations.