nicholas davidson, equity senior portfolio manager at alliance bernstein. >>> german police are still on the hunt for the driver of the truck that plowed into a christmas market in berlin on monday night killing 12. authorities freed an initial suspect they were holding because of lack of evidence. germany's interior minister said the perpetrator may still be at large. >>> the islamic state claimed responsibility for the attack but provided no evidence. they say the person responsible was a soldier of the militant group and carried out the attack in response to "calls to target nationals of the coalition countries." hans nichols reports from berlin. >> reporter: the isis claim coming in the middle of an urgent manhunt. police tonight looking for a suspect after that surprise move. releasing the 23-year-old pakistani migrant they originally thought was the truck driver. now high alert across the city. tonight we've learned new details about the attack that left at least 12 dead and nearly 50 wounded. just after 8:00 p.m. last night, a large truck jump the the sidewalk and plowed into t