Misc: What is the part of the nose that separates the two nostrils?

Questions

On This Day In January 1998 - Swedish police arrested a total of ______ people following a neo-Nazi concert near Stolkholm. Crowd members allegedly gave Hitler salutes, classified as a "hate crime" under Swedish law, during a performance by U.S. group Max Resist.?

On This Day In January 1496 - References in ______ da Vinci notebooks suggested that he tested his flying machine. The test didn't succeed and he didn't try to fly again for several years.?

On This Day In January 1521 - Pope Leo X ______ Martin Luther.?

On This Day In January 1777 - The Battle of Princeton took place in the War of______ , in which George Washington defeated the British forces, led by Cornwallis.?

On This Day In January 1815 - By secret treaty, Austria, Britain, and ______ formed a defensive alliance against Prusso-Russian plans to solve the Saxon and Polish problems.?