CAPE CANAVERAL (CBSMiami/AP) — Packed with more than two tons of supplies for the International Space Station, an unmanned SpaceX rocket is on a launch pad at Cape Canaveral ready to go.

The cargo capsule is scheduled to lift off Monday at 4:58 p.m.

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NASA spent much of the weekend debating whether to proceed with the launch. A critical backup computer failed outside the space station Friday. Mission managers decided Sunday to stick with the plan after making sure everything would be safe.

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The Dragon supply ship holds a gasket-like material for next week’s computer replacement. Spacewalking astronauts will perform the job April 22. This new material was rushed to the launch site following the computer outage.

SpaceX is one of two American shippers hired by NASA.

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