"The shuttle did some extraordinary work in low-orbit
experiments, the International Space Station, moving cargo. But now
what we need is that next technological breakthrough."
Source: President Barack Obama.
Existing aircraft-like vehicles meeting the definition of
light-sport aircraft that do not meet the provisions of 14 CFR part
103, Ultralight vehicles, and are in a ready-to-fly condition.
The European air traffic management (ATM) system currently
handles around 26,000 flights daily. Forecasts indicate air traffic
levels are likely to double by 2020.