Comment on Facebook Co-Founder Gives Up U.S. CitizenshipparentComments−GFischer14yWhich also has military service (presumably obligatory, though in practice it hasn't been so for some time)http://en.wikipedia.org/wiki/Military_service#Brazil"While de jure all males are required to serve, numerous exceptions mean military service is de facto limited mostly to volunteers, with an average of between 5 and 10% of those reporting for duty actually being inducted"
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Which also has military service (presumably obligatory, though in practice it hasn't been so for some time)
http://en.wikipedia.org/wiki/Military_service#Brazil
"While de jure all males are required to serve, numerous exceptions mean military service is de facto limited mostly to volunteers, with an average of between 5 and 10% of those reporting for duty actually being inducted"