Today was supposed to be a historic day with four rocket launches by four different companies. But that’s not going to happen. As of publication, three of the four rocket launches are canceled. The flights were pushed until tomorrow, setting up another and more significant historical event.

If all the rockets currently scheduled launch as planned, there could be five launches within a 24 hour period.

Tuesday, 8:57pm ET ULA Delta IV Heavy Wednesday 5:40am ET

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