Family laws are different by US state. That is what federal system means.
http://www.divorcenet.com/states/new_york/divorce_overseas_validity_of_foreign_divorce_ny
http://family-law.lawyers.com/divorce/getting-a-divorce-in-a-foreign-country.html
http://www.divorcenet.com/states/new_york/divorce_overseas_validity_of_foreign_divorce_ny
http://family-law.lawyers.com/divorce/getting-a-divorce-in-a-foreign-country.html