High-tech war: U.S. firm produces evidence of Chinese cyber-espionage; White House vows "meaningful dialogue." Kerry's first mission abroad: New secretary of state to head out on Middle East "listening trip." Keystone XL: Pipeline builder says "simple math" shows Canadian oil sands produce "immaterial" amount of greenhouse gas. Bankrupt Detroit? Michigan officials declare "financial emergency" in Motor City. Business: Housing market confidence sags.