(Editor's Note: This story has been updated following a Defense Writers Group event with the Space Development Agency's director, Derek Tournear, Monday afternoon.) The Space Development Agency has awarded three companies prototype agreements worth a total of nearly $1.8 billion to develop a Tranche 1 Transport Layer of 126 small communication satellites. Under the awards, which the Defense Department announced today , York Space Systems, Lockheed Martin and Northrop Grumman will each design and build 42 satellites for SDA...