Now an integral part of New York City culture, the NYC subway opened its first underground line in 1904—about 35 years after service began on the first elevated line. The subway’s early popularity was highlighted in songs like “Take the ‘A’ Train” and publicity contests like “Miss Subways.” Millions of people now ride the city’s subways every day, consistently crowding some trains well beyond capacity. What 1888 natural disaster boosted support for the creation of an underground transit system? Discuss