It remains true that physical access remains the hardest to secure:
TAO has a catalog of all the commercial equipment that carries NSA backdoors. And it’s a who’s who of a list. Storage products from Western Digital, Seagate, Maxtor and Samsung have backdoors in their firmware, firewalls from Juniper Networks have been compromised, plus networking equipment from Cisco and Huawei, and even unspecified products from Dell. TAO actually intercepts online orders of these and other electronics to bug them.