March 6: Former Arizona congresswoman Gabby Giffords spoke briefly today near the same supermarket where she was shot just over two years ago, urging Arizona’s Republican senators to support universal background checks. NBC’s Brian Williams reports.  (Nightly News)Former Arizona congresswoman Gabby Giffords spoke in brief these days near the identical supermarket where she was shot just over two years ago, urging Arizona’s Republican senators to beef up universal heritage tests. NBC’s Brian Williams reports. (Nightly Information)