Do you think Harry could cast an Avada Kedavra?

[johnryanmcc]

No: HPFGUIDX 41738

When Barty Crouch Jr. as Moody said the entire class could point 
their wands at him and cast the Avada Kedavra curse without even 
giving him a nosebleed, don't you think it would have been amusing if 
Harry had cast one?  After all, he was able to cast the very advanced 
Expecto Patronum spell with impressive results, driving away not just 
one but multiple dementors.

John McCutcheon