Chile has sacked the head of the navy's Oceanography Service (SHOA), saying he failed to provide a clear warning of the killer tsunami that followed a huge earthquake. SHOA chief Mariano Rojas was immediately removed from the post, while the head of the Navy was opening an investigation "on the circumstances of the decision process after the natural catastrophe hit the country", an official statement said on Friday. Along with the emergency response agency ONEMI and the president's office, SHOA headed the official response to Saturday's massive 8.8-magnitude tremor and ensuing tsunami waves, which killed more than 800 people and...