Barack Obama flew to London to meet Gordon Brown. Halfway through the motorcade along the streets of the English capital, Obama leaned over to Brown and whispered: "I desperately need a pee." "No problem," said Brown who immediately relayed instructions in the driver's ear. Seconds later, the car drew to a halt outside an impressive building and Brown led Obama inside. The interior of the building featured a huge marble hall with an ornate fountain and beautiful tapestries hanging on the walls. …