SpaceX will launch from Historic pad this morning

Later this morning at 10:01 am EST, SpaceX's Falcon 9 will lift off from the historic Launch Complex 39a carrying CRS-10 for NASA to resupply the International Space Station. Dragon is carrying up many hundreds of experiments and supplies for the astronauts including SAGE III and live mice. SAGE III is an experiment that will be mounted on the ISS and with its unique position over the Earth allows for long-term measurements of aerosols, ozone, water vapor, and many other gasses in the atmosphere. A Helium leak was found in the Falcon 9's second stage during the day yesterday in the second stage's spin system that has been resolved and Elon Musk tweeted, "Looks like we are go for launch. Added an abort trigger at T-60 secs for pressure decay of upper stage helium spin start system." After launch, the first stage will perform the 3rd first stage landing back at the Cape Canaveral Air Force Base at Landing Zone 1 and will be the first daytime land landing. The Dragon being launched on this mission is the last produced Dragon and they will be reused for the first time on CRS-11.
You can view the launch live on the following SpaceX streams:
Hosted Webcast (Commentary, info on launch and vehicle)
Technical Webcast (Various Camera angles, Control room audio)