XB-70, hi! Welcome to Wikipedia. I saw your username and got pulled in. I'm not typically one of the Wikipedia welcoming committee, but I had to check out that username. I'm a Valkyrie fan, too. I think the Valkyrie is one of the most beautiful things ever created by man. I disambiguated the XB-70 in the Valkyrie article as one of my first actions on the Wikipedia, a bit more than a year ago (Dec 27, 2003, before I was Catbar, just an IP address).  

 I wrote an article called "Obscure Flying Objects" for a local Mensa group that I belong to that I also published on the web. It covers the Valkyrie, as well as the ZMC-2 "Tin Bubble" and space object J002E3. Here's a link if you're interested . Sadly, some of the web links to this article are now dead, especially the x-plane drawing of the Valkyrie. Perhaps it's still there on the website, in a different place. 

 I've appended our normal welcome template below, but I wanted to say a personal "hello" too. Good luck with your future work on the Wikipedia!