Elon Musk: How the Billionaire CEO of SpaceX and Tesla is Shaping our Future

by Ashlee Vance

“A friend of mine wrote to remind me that only 5 of the first 9 Pegasus launches succeeded; 3 of 5 for Ariane; 9 of 20 for Atlas; 9 of 21 for Soyuz; and 9 of 18 for Proton.