An armor in Halo 3 that can only be obtained by impressing Bungie, or making Bungie laugh. Most of the time you see people on Xbox Live who have a boner for Recon, even though it does not change gameplay, or increase your rank or skill level. Also, there has been pics of Recon floating around Xbox Live saying: "Send this to 50 friends and get RECON". There is no doubt this is a hoax. If you've impressed Bungie, and got Recon, I congradulate you, just don't think having Recon makes you better than anyone else.
In a game of Team Slayer, I was sent 5 messages within 3 minutes of the match saying "Send this to 50 friends and get Recon Armor".