With the national jobless rate at a four-year low, check out which states have the lowest unmployment rates.
The national unemployment rate hit a four-year low in February, according to the Labor Department. The rate fell to 7.7 percent from 7.9 percent in January.
Enrique Castro-Mendivil / Reuters
St. Louis nearly burns to the ground, the first Kentucky Derby is held, the Supreme Court strikes down segregated schools, the Senate Watergate Committee begins televised hearings, and same-sex marriages begin in Massachusetts, all on this day.