Delta Air Lines, Inc. is a major American airline with its headquarters on the northern boundary of Hartsfield-Jackson Atlanta International Airport, within the city limits of Atlanta. Delta started operation by crop dusting and flying mail and then introduced passenger service. Delta's business is focused on making global connections, flying people and cargo throughout the United States and around the world. Delta Air Lines offers customers service to more destinations than any global airline with Delta and Delta Connection carrier service. Delta Air Lines and the Delta Connection carriers offer service to nearly 370 destinations on six continents. Delta has added more international capacity than all other U.S. airlines combined and is the leader across the Atlantic.