FDR Inauguration Ceremony Arrivals

The video captures a historic American scene with House Speaker Rayburn and Senate leader Barkley accompanying the President in a procession to the Capitol. Despite the cold, the President opts for an open car to acknowledge the waiting crowd. The video then transitions to the start of the oath-taking ceremonies, highlighting the presence of dignitaries, including the President's mother and the Supreme Court justices. The retiring Vice President Garner administers the oath to the new Vice President, Henry A. Wallace.

What significant event was taking place as the dignitaries approached the presidential platform?

Who was the 86-year-old mother of the President mentioned in the text?