in which you would commit to more than $600 billion? >> oh, it's certainly possible. and again, it depends on the efficacy of the program, inflation, and finally it depends on how the economy looks. >> he said they've looked at it every which way that it's possible, but he doesn't see inflation as a problem from this particular effort to try to lower interest rates and get the economy moving again. and he's concerned, kiran and t.j., concerned about the unemployment rate. we know friday the economy just created 39,000 jobs in november, that simply wasn't enough. he said it could take four or five years to get back to where we were before this crisis began. and that's -- that's something that's really sobering for the fed chief. and he said it in quite sociber terms. >> christine romans, we'll see you plenty throughout the morning. new developments on north korean tensions. president obama placing a call to china's president urging him