Today marks the second scrubbed launch attempt for Orbital's Antares rocket in a week. The first was due to a mechanical failure, but today's scratch was out of the company's control. High winds have buffeted the Virginia launch pad for two days now, making any launch attempt too dangerous.
Launching rockets is tough work, especially when it's a brand-new design. Assuming the launch eventually goes off without a hitch, the Antares will become the second commercially-developed rocket capable of delivering cargo to the International Space Station. That will be a big win for Orbital Sciences, which has been working on the design for years.
They should be trying again tomorrow. You can watch live on NASA TV.