If a person went on the Concorde, when they return home younger than their twin who doesn't go anywhere?

if true ride space shuttle must years younger when return! time still time, no 1 beats it!

if cross international dateline , gain day when cross , can cross in same direction time 365 times year earlier? answer, ...... no.

just thought, because faster move slower time you.
so, goes this: person crossed atlantic using concorde in two-way trip. person goes on flight younger when return home twin of person stayed @ home?

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