enforcement officials said yesterday that they have already accounted for 3 hours 42 minutes of the shooters' time. but those missing 18 minutes, that gap there, after syed rizwan farook and tashfeen malik stormed the inland regional center is critical. officials say to determining if the couple stopped anywhere, or contacted anyone else. let's turn to business now. chinese stocks are still down amid concerns about asian markets continuing after north korea announced its first test of a hydrogen bomb. cnbc's steve sedgwick joins us live from london. steve? >> shiba, thanks very much, indeed. i'm just looking at the live futures prices for u.s. markets, and they're down between 1% and 1. 5% for the dow, for the s&p. this follows a touch session for europe where we're down by similar margins. because of a whole host of reasons from concern about nuclear tests in north korea, concern about iran and saudi and its intentions there, concern about china and its economy and the oil prices falling aggressively as we speak between