Postponed until 02 July at 09:56 UTC (05:56 EDT) – the delay was due to a problem with the noise suppression system at the launch pad and not with the rocket or spacecraft.
This is the launch gantry around the United Launch Alliance Delta II rocket with the Orbiting Carbon Observatory-2 (OCO-2) satellite onboard. The image was taken 29 June at Space Launch Complex 2 – Vandenberg Air Force Base, Calif.
Launch is scheduled for 09:56 UTC (05:56 EDT). According to NASA:
The weather forecast is essentially unchanged and calls for a 100 percent chance of acceptable conditions at launch time. At liftoff time the temperature will be near 52 degrees, winds from the Northwest at 5-8 knots and a visibility of 1 to 2 miles in coastal fog.
NASA TV coverage at 07:45 to 11:00 UTC (03:45 to 07:00 EDT). The NASA TV link in the banner should work, but if not try here.