Mr. Zarif is research manager at the Critical Threats Project and leads its Iran team.

WSJ: Frederick Kagan and Maseh Zarif: America's Iranian Self-Deception

Diana Elliott, research manager for the Economic Mobility Project says that there are key indicators of economic mobility that often include access to education, savings and assets as well as economic poverty during childhood.

FORBES: The American Dream Is Alive And Well... In New Jersey

"People have worked their whole careers to see this flight, " said Joel Spitz, the X-43A project manager at NASA's Dryden Flight Research Center.

BBC: Mach 10 scramjet prepares for launch