In this task you will be given a text passage from a trivia quiz. You should choose the category this question belongs to from these categories: History, Science, Social Science, Fine Arts, Literature. You can only choose one category, so if in doubt, please choose the closest match.

One company in this industry collapsed on "Black Monday" of 1977. John F. Kennedy attacked a group of executives in this industry led by Roger Blough for attempting to fix prices. The Chicago Police Department opened fire on unarmed protesters and their families in the Memorial Day Massacre during a 1937 strike in this industry. A different strike prompted Charles Sawyer to seize the factories of a company based in (*) Youngstown, Ohio, resulting in a Supreme Court case. The first billion-dollar corporation was created when J.P. Morgan purchased a company in this industry that had earlier hired Pinkerton agents to break up the Homestead strike. For 10 points, identify this industry included such executives as Henry Clay Frick and Andrew Carnegie.
History