[WakeUpAndVote]

So, if I am in Eastern PA I will be able to see it!

[KevinDavis]

Countdown clock will resume in two minutes.

Once the countdown picks up, the Ground Launch Sequencer will be initiated. The computer program is located in a console in the Firing Room of the Complex 39 Launch Control Center. The GLS is the master of events through liftoff. During the last 9 minutes of the countdown, the computer will monitor as many as a thousand different systems and measurements to ensure that they do not fall out of any pre-determine red-line limits. At T-minus 31 seconds, the GLS will hand off to the onboard computers of Discovery to complete their own automatic sequence of events through the final half minute of the countdown.

[RightWhale]

It might be visible, but look close because the flame from the motors is hydrogen-oxygen. Clear flame.