"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.
Take the decision in early March to arrest Muqtada al-Sadr. It was made apparently without knowledge or understanding of the nature of his movement or how widespread it is.
As an actor, it's more interesting to play a nerd than anything else. It's a lot more fun - you don't worry about 'what's my hair like?' in the morning or 'which is my great angle?'