What is the relationship between Northrop Grumman and Northrop in the context of the input sentence. Choose an answer from: product/material produced; manufacturer; distributed by; industry; position held; original broadcaster; owned by; founded by; distribution format; headquarters location; stock exchange; currency; parent organization; chief executive officer; director/manager; owner of; operator; member of; employer; chairperson; platform; subsidiary; legal form; publisher; developer; brand; business division; location of formation; creator.

As previously reported, earlier this year, Northrop Grumman announced that Kratos' C5ISR is part of the Northrop ground based strategic deterrent team, and we are looking forward to supporting Northrop, an incredible partner of Kratos’, on this critically important national security program.

Answer: owner_of