From CNN Washington bureau intern Hyun Soo Suh

Secretary of Defense Leon Panetta has a lot of problems looming over him these days.

A war in Afghanistan, Iran's nuclear aspirations, the "meat ax" of possible additional $500 billion in cuts to his budget, to name a few.  Panetta does not seem like a man who would sleep easily at night.  But it's not even that daunting list that keeps him up at night, he said this week.

"The one thing that I worry about the most right now is knowing that [a cyberattack] is possible, and feeling that we have not taken the necessary steps to protect this country from that possibility," Panetta said at the University of Louisiana Thursday March 1st. FULL POST