Originally Posted by k_doll
you know when zabusa was killed (fake death) by haku to save him! kakashi explained that the masked kid ia a member of an anbu scuad. they said that anbu has training on body anatomy. so they have training right. itachi was nominated due to his superior skills.
I personally thought that they might have test for them to go through, as well as training once your in ANBU. Not necessarily training to become one, there are a lot of things I wish were cleared up in the Naruto world but I guess there isn't enough time for that.