The US military will become "leaner" while maintaining superiority as it switches focus to the Asia-Pacific, US President Barack Obama has announced. In a rare appearance at the Pentagon, he unveiled a far-reaching defence review under which thousands of troops are expected to be axed. He said the tide of war was receding, and the US needed to renew its economic strength. The Pentagon faces more than $450bn (£288bn) in cuts over the next decade. "So yes, our military will be leaner," Mr Obama told reporters, "but the world must know - the United States is going to maintain our...