Dense fog and mist since early morning have brought flight operations to a standstill at Tribhuvan International Airport in Kathmandu and various other airports across the country.Buddha Air informed that flights could not commence at airports including Kathmandu, Biratnagar, Rajbiraj, Nepalgunj, Dhangadhi, Surkhet, and Tumlingtar.Airport sources indicated that flight arrivals and departures will resume once the weather improves....