Air Force One has a gym, electronic defence units and shielding to protect it from nuclear blasts. At Stansted, Obama will transfer to his helicopter Marine One, which has flares and anti-missile countermeasures to deal with heat-seeking and radar-guided missiles.
Obama will travel around London aboard Cadillac One, which does eight miles to the gallon and is described as "a panic room on wheels". It is equipped with shotguns, tear gas, a night-vision camera and bags of Obama's blood (group AB). Among the 500 or so US personnel who will travel with the president are nurses and surgeons. The lengths people go to to avoid NHS treatment.
Other staff include security agents and Obama's personal aide Reggie Love, who will hand the president his (ideally bomb-free) basketball each morning so he can shoot hoops.
There's also details on the planned protests.
First off will be four simultaneous marches, led by effigies of the four horsemen of the Apocalypse, which will leave Moorgate, Liverpool Street, Cannon Street and London Bridge stations at 11am, converging on the Bank of England. Take your pick from war, climate chaos, financial crimes and land enclosures. Meanwhile, 1,500 people plan to bring tents and erect a climate camp in the City outside the European Climate Exchange at Bishopsgate at lunchtime. On top of that, the Stop the War coalition will march from the US Embassy in Grosvenor Square to Trafalgar Square in the afternoon. On Thursday, the official day of the summit, protests will centre on the Excel centre in Canning Town.
They also tell you what's in the goodie bags and what the whole shebang is costing.
And France's Nicolas Sarkozy is threatening a walkout.
For serious, comprehensive coverage, check out this BBC site.
