Ah, Mr. Bond, we've been waiting for you - and at last 007 is back, several years after his last screen adventure. Producers announced Thursday that filming has begun on "Skyfall," the delayed 23rd film in the series and Daniel Craig's third outing as the suave British superspy. Craig, who has brought a hard edge to his portrayal, told reporters that the movie, directed by Sam Mendes and shot in London, Scotland, Turkey and China, would be "Bond with a capital B."