"Ahu" are stone platforms on which many moai sit. There are 313 known ahu and 125 of these carry moai. The biggest, Ahu Tongariki is 220 m (720 ft), and had the most (15) and tallest moai.
I would have told him that I appreciated his friendship through the years and that I had learned a lot from him. I really loved Frank like you do a brother.
On the battlefield, the military pledges to leave no soldier behind. As a nation, let it be our pledge that when they return home, we leave no veteran behind.