A cyber risk to the U.S.
If this doesn't scare you, I don't know what will.
Though the Pentagon has a cybercommand, it does not cover the domestic civilian economy, including vital infrastructure systems such as the electric power grid, water supplies and the financial system. Many of the computers controlling those utilities lack adequate security measures and could be devastated by viruses launched by hostile states or even hackers. As it is, U.S. companies, from defense contractors such as Lockheed Martin to e-mail carriers such as Google, are under continual assault from China and Russia, which seek to steal industrial or national security secrets and probe for infrastructure weaknesses.
Unfortunately, instead of more adequately funding programs that can protect the U.S. from cyber attack, our elected leaders continue to choose to fund wasteful programs like the Joint Strike Fighter, dubbed The Wild Blue Squander by The New York Times. Here is a GAO chart illustrating the cost history of the Joint Strike Fighter: