The Indian armed forces on Sundaythanked those engaged in the fight against COVID-19 by showering flower petals from their aircraft on various hospitals in Mumbai and carrying out a fly-past over the Maharashtra Governor's house here.An aircraft of the Indian Air Force dropped flowers on the state-run J J Hospital, KEM Hospital and the Kasturba Gandhi Hospital, which have been treating coronavirus patients here, a defence official said.The India Navy and the Coast Guard also flew their Chetak helicopters to shower flowers on the J J Hospital and naval medical hospital Asvini in the state capital.Besides, the Sukhoi-30 fighter planes flew over the city's iconic Marine Drive and carried out a fly-past over the Governor's house here, said the official.The country's armed forces on Sunday engaged in a nationwide exercise to express gratitude to lakhs of doctors, paramedics, sanitation staff and other front-line workers involved in fighting the coronavirus pandemic.