Did Fox News's Shepard Smith just mistranslate "Gambatte kudaasai"?

Yesterday evening (Friday, March 18, 2011) Shepard Smith translated "Gambatte kudasai" as "Be strong". Now to my anime, computer Japanese lessons, and small Japanese to English language dictionary addled brain, "Gambatte kudasai" should be translated "Do your best, please", a small but significant difference. So, did Shepard Smith get it wrrrong?