In The News
When a grocer sells bad milk, customers are free to shop at another store. If there is no other store, a new one will be opened, promising and providing fresh milk. The first grocery store must then either offer fresh milk or lose its customers to the store that provides what is needed.
By Kevin McCarthy
SpaceShipTwo, scheduled to carry tourists to space beginning in 2013, undergoes an unpowered glide flight test over Mojave in late 2010. Courtesy of Virgin Galactic