With the advent of longer haul aircraft and the socio-economio-political degeneration of the state during the 1960s, several airlines gradually discontinued operations there. The withdrawal of Lufthansa's service to Frankfurt in 2012 left Kolkata with no direct flights beyond Asia. Kolkata airport is to undergo the execution of Phase 2 of the expansion plan which primarily involves the construction of an 86-meter ATC Tower. Additionally, the current Kolkata Metro expansion plans include two new lines to the airport for better connectivity.