The US Government Accountability Office (GAO) has revealed why it upheld Microsoft’s challenge over the award of a $10bn National Security Agency (NSA) cloud contract to arch-rival AWS. The protest filed by Microsoft was regarding a procurement named WILDANDSTORMY (WANDS) won by AWS in August, and on 29 October the GAO sustained it, but declined to explain what bits of the NSA’s evaluation it had deemed unreasonable, citing worries about classified information.

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