Boeing's development of the Sonic Cruiser project in the early 2000s was a failure that cost the company its leadership position in the commercial aircraft market. The Sonic Cruiser, which would have carried 225 passengers at near supersonic speeds, was the wrong aircraft developed at the wrong time as the 9/11 attacks plunged the aviation industry into an economic downturn. Despite meetings with customers over 4-5 years, Boeing struggled to decide whether the Sonic Cruiser or a more efficient aircraft was the right path. Rival Airbus capitalized on Boeing's indecision and ultimately Boeing canceled the Sonic Cruiser project in 2003, acknowledging it needed more research.