Misc: A "pigskin" is another name for a(n) ________?

Questions

On This Day In January 1929 - The Seeing Eye was incorporated in Nashville, TN. The company's purpose was to train ______ to guide the blind.?

On This Day In January 1936 - The United States Army adopted the semi-automatic______ .?

On This Day In January 1937 - The first issue of "Look" went on sale. Within a month, "Look" became a biweekly______ .?

On This Day In January 1940 - Television was used for the first time to present a sales meeting to convention ______ in New York City.?

On This Day In January 1951 - The United Nations headquarters officially opened in ______ York City.?