Ethics of unmanned or drone weapon systems

I feel that morality or immorality would apply to those individuals on the ground giving intelligence.  The drone weapon technology, as I understand it, does not cause mass destruction, and if used properly could save young American lives, and reduce civilian casualties.

From an ethical standpoint, I see no difference, however pilotless is safer for our troops. 

I do agree that they are safer for our troops, however is that such a good thing? If peoples lives were more in danger would there be more consideration on attacks planned. I know reality is that no, kids would be sent in regardless, but I like to think that some thought about human life is taken into consideration.
As for ethics then the ones in control have to live with what they do, as do all the 'higher ups'. I see no difference between the unmanned and manned weapons.
I think most of the controllers realize this, and I have heard about these guys having PTSD just like guys on the front line.   

But however this same moral equation can be application to those executing a prisoner by firing squad. Of course you can have the "other" put blanks in your gun but your intent is to take a human life. Now, with respect to military the equation if more complex because if your target is one person, you must be absolutely sure he (or she) is responsible for which death is justified.