The Clinton campaign just released a commercial promoting her foreign policy experience. The message is that she's better equipped to handle calls from the "global disaster phone" in the Oval Office. The commercial begins by showing images of sleeping children with a voice over about a phone ringing in the White House at 3AM. The commercial ends with the line, "In a dangerous world, who do you want answering the phone?" Then Clinton is shown answering a phone.
The Obama campaign quickly released an ad in response to Clinton's that looks just like hers in the early seconds showing sleeping children. He counters by playing up his opposition to going to war in Iraq. The final line in his commercial is, "In a dangerous world, it's judgment that matters."
See both commercials here.