By Lily Altavena | Arizona Republic
The hallways are sparse, painted white. Some are seemingly endless stretches of gray, concrete floor.
There are few hints that the Mesa fortress you have stepped into belongs to Apple Inc., the technology behemoth based in Cupertino, California.
The Arizona Republic took a rare tour inside Apple’s 1.3 million-square-foot data center on the corner of Signal Butte and Elliot roads. The company, known for its secrecy, would not share many specifics about what happens inside the facilityfilled with servers, citing security concerns.