Boeing 787 Dreamliner
In the late 1990s Boeing wanted to make a plane called the Sonic Cruiser, which would go very fast. According to Boeing, the 787 consumes 20% less fuel than the similarly-sized 767. But after the September 11, 2001 attacks fuel prices went up, so airlines wanted more efficient planes rather than faster ones. Boeing cancelled the Sonic Cruiser and replaced it in January 2003 with the "7E7," which was the code name for the 787 at the time. In July 2003, Boeing decided to call the new plane the "Dreamliner."