A 15-meter-wide sinkhole has recently opened up in a city in Mississippi and swallowed at least 15 vehicles, police said, adding that what caused the sinkhole is still unknown and is being investigated. The sinkhole appeared in the parking lot of the new IHOP restaurant on Frontage Road in the city of Meridian. The customers at the restaurant told local WTOK-TV that they heard several booms that were...