impeachment trials. but much like his first, the former president was eventually acquitted by the senate. just a week later. >> congratulations, mr. president. >> joe biden becomes the 46th president of the united states. the socially distanced inauguration taking place under a cloud of uncertainty. also in january the covid death toll passes 2 million around the world. it would grow to over 5 million by the end of the year. the containment effort was on delta, more contagious and deadly than the original. a big push for vaccinations and boosters as the best way to stop the spread. shots from pfizer, moderna, john john getting the green light from the fda. millions signed up immediately. demand tapered off as vaccine hesitancy set in. the biden administration