News at Seven-Thirty highlights:HK visitors to mainland found counterfeit banknotes at reputable foreign exchange shops; a government-appointed committee has been set up to review existing drug regulation system; North Korea confirmed to have detained two American journalists; Pentagon is investigating a collision between a U.S. Navy submarine and a American amphibious ship; Obama apologized to the chairman of Special Olympics; Pope Benedict XVI criticised sexual violence against women in Africa; HK Government may compensate the owners of heritage building; Civil Service Bureau admitted mistake made in Leung Chin-man controversy; U.S. Scientists found new treatment for Parkinson’s disease.