Responsibility for the 13-day detention of Chester County businessman Nick Berg prior to his kidnapping and murder in Iraq rests largely with U.S. authorities, U.S. Rep. Jim Gerlach (R., Pa.) said yesterday. Gerlach, whose Sixth Congressional District includes the West Chester suburb where Berg lived, said it was "clear the Iraqi police were only going to hold Nick until such time as they were told by U.S. authorities that it was OK to release him." "As to why there was that length of detention, and what could have been done to shorten it, that's a question that is still outstanding,"...