How do you get the bungie symbol by your gamer tag on Halo 3?

I see people with the bungie symbol by there names in matchmaking in halo 3. i have gone to bungie.net and made an account and everything but i have not had the symbol by my name does anyone know how to get that?How do you get the bungie symbol by your gamer tag on Halo 3?go to bungie.net then you make a

windows ID

and go through all the steps and when ur done it will have box that asks you if you want to link your new ID to a gamertag and then there you goHow do you get the bungie symbol by your gamer tag on Halo 3?never played halo