How do I get emergency renewal passports for our children and are they required?

Question: We are traveling to Japan in less than a week for a family emergency as my wife's father has died (my wife is Japanese with a valid US Green

Source: http://www.us-passport-service-guide.com/how-do-i-get-emergency-renewal-passports-for-our-children-and-are-they-required.html

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