India, Jan. 21 -- Joe Biden and Kamala Harris were sworn-in as the 46th President and 49th Vice President of the United States of America, respectively, on Wednesday. At 78, Biden, who succeeds Donald Trump in office, is the oldest person to assume US presidency.

As the Biden-Harris era begins, here's a look at some key 'firsts' of the new administration:

1. Harris is the first-ever woman to hold the office of US President or Vice President. Daughter of an Indian mother and Jamaican father, she is also the first Vice President of African-American and Asian-American descent.

2. Avril Haines was on Wednesday confirmed by the US Senate for the position of director of national intelligence, making her the first official member of President...