Turducken...

In the midst of the Cold War, the USA hatched a plan to use 747 style airliners as airborne aircraft carriers. Various styles of small fighter planes and bombers were designed to be carried around in the belly of the airliners.

Read more about it via VectorSite:

www.vectorsite.net/avparsit.html#m5

See the classified documents via Scribd:

www.scribd.com/doc/24276025/Micro-Parasite-Figther