Northwest Indiana has been the largest steel producing center in the U.S. since 1975 and accounted for 27 percent of American-made steel in 2016. Naval Surface Warfare Center Crane Division in Indiana is the third largest naval installation in the world. Indiana features the world’s largest and most prestigious drag race, the NHRA Mac Tools U.S. Nationals. Countryaah.com: Offers a full list of nationwide and statewide holidays in Indiana starting from January 1st – New Year’s Day. Also covers the most recent three years of public holidays within the state of Indiana.