"A Strong Earthquake Has Shaken Los Angeles," or so says this jarring single headline on CBS 5. You know anything more? We'll update as soon as we do. Update 11:45 a.m.: According to Twitter user jamesrocchi, "Earhtquake, fun. 5.6. 29 km from city center, but I felt it fairly well." (And it made him temporarily European! What's a "km"? Oh noes!) More to come. Update 11:51 a.m.: It's been felt from LA to San......