Authorities used boats, personal watercraft, poles and their bare hands to remove protesters in kayaks and hanging from bridges who had tried to block a Royal Dutch Shell icebreaker bound for an Arctic drilling operation. The Fennica left dry dock Thursday afternoon and made its way down the Willamette River toward the Pacific Ocean soon after authorities forced the demonstrators from the river and the St. Johns Bridge. Shell spokesman Curtis Smith said the Fennica was on its way to the Chukchi Sea where one of the energy giant's vessels started initial drilling operations Thursday night.