Fast planes.

[Sferrin]

Too bad this isn't available in high rez. I've only seen very few pictures of this get together and none of them were in color and high rez.

 

[Orionblamblam]

Best I know of off hand.

 

[dan_inbox]

https://simotron.wordpress.com/2012/05/30/xb-70-an-sr-71-or-a-12-and-something-else-i-cant-identify/