sentences:  With both I-55 and I-40 traveling toward the Mississippi River, West Memphis became known as the "crossroads of America" in the trucking industry.In 1973, a six-lane highway bridge, known as the Hernando de Soto Bridge and located north of the Harahan, opened as part of I-40.On December 14, 1987, a tornado killed six people and caused approximately $35 million in damage.