Air Gapping a MacBook Air: The Great BCM15700A2 Mystery
uhhh...how does this prove that the chip doesn't have radio functionality?  they didn't figure out any information about the chip's actual functionality beyond its PCI device name, which would ostensibly not be "SUPER SECRET DATA EXFILTRATION RADIO FOR NSA".  they just took it off, unplugged the wifi card, and then said "well, it doesn't connect to wifi networks now.  must be fine".