Lawmakers are continuing with the certification of Joe Biden's win in the November presidential election after clashes on Capitol Hill during which four people died Proceedings were halted when the complex was overrun by a violent group of President Trump's supporters angry at what they considered to be a rigged election Washington DC is under curfew and police in riot gear continue to guard the streets So far, at least 52 people have been arrested - 47 of them for curfew violations Twitter and Facebook have locked President Trump's accounts, preventing him from being able to post