This incident has been a double tragedy. Obviously, the deaths of innocents, but also the mental breakdown of a soldier. I wouldn't call it a "My Lai" as it was a lone wolf crazy following his own deranged orders, but it may not matter.
After the urinating incident, and the Koran burning incident we are in position where profuse (and desperate sounding) apologies from afar don't cut it anymore...if they ever did.