You may not be aware of it, you may not even consider it, but critical infrastructure allows for all of the modern-day conveniences we are used to. The health of the nation depends on the infrastructure that provides electricity, moves and controls water, provides gas and oil, and ensures the operation of our transportation and communication networks. When we flick a light switch, when we get a glass of water, when we pump gas into our cars, when we dial 9-1-1 in an emergency—all of these things that we may take for granted are available to us because of the infrastructure that supports the delivery of these goods and services.