NEW YORK - Vice President Joe Biden and relatives of the Newtown, Conn. shooting victims joined Mayor Michael Bloomberg in New York City to urge Congress to take up a ban on assault weapons.

The group spoke at City Hall today, using the Newtown tragedy as an example of why high-capacity guns need to be off the streets. Bloomberg also emphasized proposals for expanding background checks on gun buyers.

Senate Democrats have dropped the ban from the gun control package they plan to consider next month, but Biden reiterated that the White House is still pushing for the measure.