The Pentagon confirmed this month that the cost of the fleet of 28 new super-sophisticated helicopters has jumped from $6.1 billion when the contract was signed in 2005 to $11.2 billion today. Outfitted with cutting-edge communications equipment, antimissile defenses and hardened hulls, each of the VH-71 helicopters, to be dubbed Marine One whenever the president is onboard, will cost $400 million -- more than the most recent Boeing 747 jetliner outfitted to serve as Air Force One when it was delivered in 1990, even when adjusted for inflation.

The specifications of the new craft remain largely secret, but some details have leaked into trade publications or have been disclosed in congressional briefings. The 64-foot-long helicopters must carry 14 passengers and thousands of pounds of additional equipment while being able to fly farther without refueling than existing Marine One choppers can. They must be able to jam seeking devices, fend off incoming missiles and resist some of the electromagnetic effects of a nuclear blast.
Source http://www.washingtonpost.com/wp-dyn/content/article/2008/03/16/AR2008031602936.html?hpid=topnews
He who laughs last obviously has'nt heard the bad news.