Bangladesh Air Force’s C-130 and K-8 aircraft release smoke in red and green, the colours of the country’s national flag, in an aerial display in the sky as part of celebrations of its 50th anniversary on Tuesday, Sept 28, 2021. Photo: Mahmud Zaman OviBangladesh Air Force’s Bell 212 helicopters take part in a flypast in the sky as part of its 50th anniversary celebrations on Tuesday, Sept 28, 2021. Photo: Mahmud Zaman OviBangladesh Air Force pilots take part in an aerial display with MiG-29 and F-7 fighter jets in Dhaka’s sky as part of celebrations of its 50th anniversary on Tuesday, Sept 28, 2021. Photo: Mahmud Zaman OviBangladesh Air Force pilots take part in an aerial display with MiG-29 and F-7 fighter jets in Dhaka’s sky as part of celebrations of its 50th anniversary on Tuesday, Sept 28, 2021. Photo: Mahmud Zaman OviBangladesh Air Force’s Mi-17 helicopters take part in a flypast in the sky as part of its 50th anniversary celebrations on Tuesday, Sept 28, 2021. Photo: Mahmud Zaman OviBangladesh Air Force’s Mi-17 helicopters take part in a flypast in the sky as part of its 50th anniversary celebrations on Tuesday, Sept 28, 2021. Photo: Mahmud Zaman OviBangladesh Air Force’s Bell 212 helicopters take part in a flypast in the sky as part of its 50th anniversary celebrations on Tuesday, Sept 28, 2021. Photo: Mahmud Zaman OviBangladesh Air Force’s C-130 and K-8 aircraft release smoke in red and green, the colours of the country’s national flag, in an aerial display in the sky as part of celebrations of its 50th anniversary on Tuesday, Sept 28, 2021. Photo: Mahmud Zaman OviBangladesh Air Force pilots take part in an aerial display with MiG-29 and F-7 fighter jets in Dhaka’s sky as part of celebrations of its 50th anniversary on Tuesday, Sept 28, 2021. Photo: Mahmud Zaman OviBangladesh Air Force pilots form the number 50 with PT6 aircraft in the sky as part of celebrations of its 50th anniversary on Tuesday, Sept 28, 2021. Photo: Mahmud Zaman Ovi