That would require a more expensive Atlas rocket.
Atlas rockets carried American astronauts into orbit in the Mercury program.
Of 500 Atlas rockets launched since the 1950's, 13 have carried commercial payloads.
He also created an early space station design, based on launch by Convair's Atlas rocket.
Lockheed Martin engineers are expected to begin assembling the new Atlas rocket in 1998.
All of them will probably be launched by Atlas rockets, rather than shuttles.
The American Atlas rocket, by contrast, usually can carry only one.
Early Atlas rockets were also built specifically for non-military uses.
The Atlas rocket suffered a structural failure 58 seconds after launch.
Earlier today, an unmanned Atlas rocket hurled a military communications satellite into orbit.