Apple revved up the iPad brand Thursday with a new iPad Air 2 that is just 6.1 mm thick. “It is the thinnest iPad we have ever made,” said Phil Schiller, Apple’s senior vice president of worldwide marketing. The new iPad Air 2 is so thin that two stacked on top of one and other are still thinner than the original iPad, said Schiller. Apple will begin to take orders for the new iPads on Friday and they will ship “next week,” said Schiller.