Provided a U.S. official can pass routine (often quite superficial) security clearances before taking up his appointment, he is unlikely to be found out.
During this process, which was handled at Home Office official level in the routine way, there was no contact between the Home Office and DCMS at any level, or indeed with Tessa Jowell's husband.
Two sailors were undergoing a free-fall routine before opening their parachutes, a Navy official said in a statement, which added it was a normal exercise to maintain readiness.