Former Arizona Congresswoman Gabby Giffords returns to Capitol Hill today to help introduce a bill on gun background checks.

 The legislation would require background checks on private transactions for gun sales.
 The bills' introduction falls on the eighth anniversary of the shooting that nearly killed Giffords and left six others dead.
 She'll join newly-elected House Speaker Nancy Pelosi and Congressman Mike Thompson, a California Democrat, to unveil the bill.
 Democrats have long been signaling they would make legislation to address gun violence a top priority.
 They introduced a similar bill, with some republican co-sponsors in November.
 But it didn't make it to the floor while democrats were in the minority.