Nose of B-52 Stratofortress. Those still in service have been upgraded to serve on until 2040, which will mean they will be the first front-line aircraft to complete 90 years of service!

Nose of B-52 Stratofortress. Those still in service have been upgraded to serve on until 2040, which will mean they will be the first front-line aircraft to complete 90 years of service!