AFP
A video viewed nearly 200,000 times on Instagram appears to show a crowd interrupting US President Joe Biden with an expletive-laden chant during a speech on gun reform. But the clip has been manipulated; the original footage of the address shows Biden reacting as the father of a school shooting victim stood up to call for a greater response to gun violence."Sit down, you'll hear what I have to say," Biden says in the video, as the crowd, unseen in the background, appears to drown him out with j