Yes.
Why?
It's their sworn duty to be armed and dangerous.
You think 250,000 troops throughout the US should be armed?
Yes.
Why?
Same reason as above. It's our constitutional right to keep and bear arms. I expect military personnel to be especially trustworthy in that respect. I'm a pacifist, but I'm not stupid. If you cannot trust a soldier with a loaded gun, something is seriously wrong with either the soldier or the system or both.
Do you realize how helpless this incident makes our military look?
Further I didn't make the rule so argue with those that did.