Columbus Day celebrates the first landing of explorer Christopher
Columbus on the shores of the New World which occurred on the
12th of October in 1492. President Franklin D. Roosevelt proclaimed
It a federal holiday in the United States in 1937. President Richard M.
Nixon later declared the day a national holiday to be observed on the
second Monday of each October. 

Amelia Earhart

(Reuters) – A team of researchers trying to solve the mystery of aviator
Amelia Earhart’s 1937 disappearance said on Friday that underwater
video from a Pacific island has revealed a field of man-made debris
that could be remnants of her plane.

The footage was collected in July by The International Group for Historic
Aircraft Recovery (TIGHAR) during a $2.2 million expedition to Nikumaroro
in the Republic of Kiribati.

Amelia Earhart‘s Lockheed Model 10 Electra 

Underwater video showing  a semicircle at top (the fender?) and a round object
off to right. (Click to enlarge)