What is the relationship between Global Entry and U.S. Customs and Border Protection 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.

U.S. Customs and Border Protection meanwhile recently announced that Global Entry , a similar pre-screening program, but one aimed at international travelers, had enrolled its two millionth member.

Answer: operator