BERLIN — The day after a truck plowed into a shopper-filled Christmas market, killing a dozen people and wounding dozens more, Germany continued to grapple with the aftermath: the shock of the attack, identifying the victims, tracking suspected links to Islamic terrorist groups, and debating whether the open-door asylum policy of Chancellor Angela Merkel shares some of the blame.With investigators’ release Tuesday of the prime initial suspect in the rampage, a young Pakistani asylum-seeking refugee who arrived in the country barely a year earlier, Berliners were living with the terrifying fear that the killer or killers were still at large, armed and capable of striking again.
