A US expert said Thursday that the transfer of wartime operational control to South Korea from the United States would not "unzip" the bilateral alliance, downplaying concerns that the move could weaken America's security commitment to the Asian ally. Bruce Klingner, senior fellow at the Maureen and Mike Mansfield Foundation, made the remarks during a forum, citing Washington's pledge to offer "enduring" defense capabilities to South Korea, the bilateral mutual defense treaty and the presence of