WASHINGTON, Sept. 9 -- Law firms assisted companies in the following recently announced transactions: * * * Gibson, Dunn & Crutcher... ...advised SpaceX on its $17 billion acquisition of EchoStar's full AWS-4 and H-block spectrum license portfolio, including related international rights, in a deal designed to strengthen SpaceX's satellite communications capabilities. The Gibson Dunn team is composed of corporate partners George Sampas, Robert Little, and James Springer, with associates Cody W more ST