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Weather forecasters will watch for isolated rain showers and gusty winds that could delay Thursday’s launch of a Delta 4-Heavy rocket carrying NASA’s Orion space capsule on its first flight into orbit.

As a United Launch Alliance Delta 4-Heavy rocket prepares to carry NASA’s Orion spaceship on its first orbital flight test, we look back at the seven previous Heavy launches.

The first flight test of Orion will be a two-orbit, four-hour shakedown cruise to check critical systems of the crew capsule.