Obama calls for support on gun law changes

The White House has released a video of President Obama calling on people in America to support changes to gun laws in the US.

The president says, "in the days since the heartbreaking tragedy in Newtown, Connecticut, hundreds of thousands of you, from all 50 states, have signed petitions asking us to take serious steps to address the epidemic of gun violence in this country.

"So I just want to take a minute today to respond and let you know we hear you."