President-elect Joe Biden is expected to be inaugurated amid unprecedented security in the nation’s capital; cases of covid-19 are down 11% since last week’s peak but a new strain of the virus threatens to push the total number of cases further; experts say the DC insurrection should lead to drastic change in addressing online disinformation; Mexican President Lopez Obrador says US and Central American officials are coordinating efforts to deal with thousands of migrants heading for the US/Mexico border.