Passengers were stuck inside aircraft – some upto nine hours – as denser-than-expected fog crippled flight operations at Delhi airport on Monday.As many as 68 flights were cancelled and five others diverted resulting in network-wide delays.Low visibility operational procedures were initiated at Delhi airport on Sunday night. Operations were suspended around 3.30 am. Seven aircraft, including those of Air India, British Airways, Lufthansa, Kuwait Airways, KLM Royal Dutch Airlines and Aeroflot, which had push ...