A custom-built two-wheeled machine signed by none other than US President Barack Obama is to go under the hammer in Las Vegas later this week, Barret-Jackson Auctions revealed recently. Hardcore Choppers P-40 Warhawk features a six-speed transmission and a V-twin engine that is capable of developing 150 horsepower and 197 Nm of torque. This amount of power propels it from zero to 60 mph (97 km/h) in 2.7 seconds with a top speed of 160 mph (258 km/h). It will be auctioned by Barrett-Jackson Auction Co. on September 23-25 to benefit the Fisher House Foundation. The foundation builds houses around the country and donates them to the government to provide free housing to military families who have someone being treated at a military or Veterans Affairs hospital. There are 49 Fisher Houses on the grounds of military and VA medical centers.