Trump supporters mock Biden as he slips again while boarding the Air Force One

In a third instance in four months, U.S president Joe Biden stumbled up the stairs of Air Force One as he boarded the presidential plane at Andrews Airforce Base to fly to California. Biden briefly tripped and put his hand down to regain his balance as he made his way up the steps onto the plane. The fresh episode triggered a major fight on Twitter between the supporters of Biden and Donald Trump after the latter mocked the U.S president. Watch the video for more.