In the 1960s the riots in cities led to the requirement of 'no windows' and datacenters were not to share walls with the exterior walls, so that breaching a dat

In the 1960s the riots in cities led to the requirement of 'no windows' and datacenters were not to share walls with the exterior walls, so that breaching a datacenter required going through 2 walls. These requirements no doubt play a large factor in the building's design.