For example , the United Launch Alliance subcontracts the production of GEM solid rocket motors for its Delta II and Delta IV rockets to Alliant Techsystems .
Some of these tasks may be delegated or sub-contracted to other companies .
The United Launch Alliance subcontracts the production of GEM solid rocket motors for its Delta II and Delta IV rockets to Alliant Techsystems .
Some of these tasks may be delegated or sub-contracted to other companies .