"It often takes 4-5 hours for the visibility to improve and passengers get uncomfortable inside the aircraft. Some even complain of breathlessness and suffocation in the closed space. To avoid the yearly inconvenience, the Delhi airport operator had requested CISF to allow reverse entry, where passengers can be brought back to the terminal from the boarding gate. But the CISF said it will be “a security concern as passengers will get mixed”. “Once the passenger leaves the departure terminal, they cannot enter from the boarding gate," reported The Hindustan Times quoting an official.