Hagel's resignation is just the tip of a very large iceberg of disgust w/ Obama's national security policy!
Hagel was Obama's third Secretary of Defense. The first two, Gates and Panetta have each written books criticizing Obama's conduct of national security. Hagel is reported to be deeply unhappy with the way the White House treated him. Resigning less than two years is very unusual. How long will it be before the Hagel book comes out.
What a shame that the generals who are seething about Obama's conduct don't follow Hagel's lead and make the problem more public.
It should be abundantly clear by now that the problem in national security policy won't go away by changing the Secretary of Defense. Three times is not the charm. The problem lies at the top!