Federal officials are injecting a sense of urgency into multiple initiatives to more effectively secure the Defense Department’s expansive supply chain from cyber threats, as one official warned the issue is nearing a “tipping point.” The federal government is still struggling to grapple with the “complexity” of its cybersecurity and supply chain problems, according to Ron Ross, a computer scientist and fellow at the National Institute for Standards and Technology who leads the development of cybersecurity standards. The complexity is...