Training offense and defense equally
I found this rather telling: "One of the biggest things I saw as the director of the NSA is we trained our offense at one level: these guys get world-class training and capabilities. Our defense [is] guys that are taught IT and how to bring networks up, but they aren't taught how to go against the adversary," said Alexander. "We've got to come up with a program that trains our defenders and those that operate the networks to understand exactly what's coming at them."
Sports teaches it again and again, that you can't win games without both offense AND defense! It's distressing to think that the people defending the country aren't nearly as well-trained as those that are attacking other countries. (at least as it pertains to cyber-attacks)