Senior Defense Department officials are calling on industry to better protect their supply chains from cyber threats, but uncertainty surrounding DOD's implementation of stringent network security requirements has companies wondering how the department will enforce compliance moving forward. The Pentagon had originally set Dec. 31, 2017, as the deadline for defense contractors to comply with the National Institute of Standards and Technology publication for handling controlled unclassified information. The NIST rule lays out security controls and processes contractors should implement...