Story : Insiders - Steve Kroft reports on how America's lawmakers can legally buy stock based on non-public information. Taser - The non-lethal device has saved many lives and prevented serious injury to suspects and police say its law enforcement advocates, but a new study says some authorities use it too quickly, causing unnecessary pain and sometimes death. Freeman Hrabowski - University President Freeman Hrabowski has turned the University of Maryland Baltimore County into a well-known producer of outstanding scientists and engineers, many of whom are minorities.