Canberra still going strong ...

[The Nr Fairy]

Canberra ( WB-57 ) used to track the solar eclipse in April - https://www.bbc.co.uk/news/av/world-us-canada-68746638

Lovely to see such an old girl still doing sterling work.

[rattman]

NASA have 3, you can google their mission spreadsheet. 2 are operational and 1 is currently in deep maintainence