Bernt Balchen discusses going back to the South Pole

The video discusses the selection of a suitable plane for an expedition led by Mr. Lincoln Ellsworth. The expedition will travel from the West Coast of the United States across the Pacific to New Zealand, establishing a base on the continent. The team will maintain radio communication with their base and the United States. The expedition aims to survey land between the Weddell Sea and Ross Sea, sponsored by the American Geographical Society.

What is the purpose of the expedition?

Who is sponsoring the expedition?