How is the new Hayden planetarium different from the old planetarium

it has a lot of new features to

Explanation:

in 1897, pershing became a tactical officer at west point, and that's where he was given the nickname "black jack." pershing's first name is "john," for which "jack" is a nickname, and he was a white man who commanded black troops. hence "black jack".

a.) are both appointed for life