What You Need to Know: The North American XB-70 Valkyrie epitomized Cold War aerospace ... The F-104 sheared off the XB-70s vertical stabilizer and damaged its wing; the F-104 exploded brilliantly.

Here’s What You Need to Remember: Only two of the enormous XB-70 bombers were ever built; one resides in a museum in Ohio, the other was destroyed in a collision in ...