Proton on launch padPublished November 3, 2014 at dimensions 2136 × 1404 in Blog. Next → https://howtobearocketscientist.com/wp-content/uploads/2014/10/Proton-on-pad-1024x673.jpg https://howtobearocketscientist.com/wp-content/uploads/2014/10/Delta-launch-square-1022x1024.jpg