Science fiction convention in the USA?

Question:

Science fiction convention in the USA?

Where and when is the next biggest SF convention in the USA?

Best Answer - Chosen by Asker:

The San Diego Comic Con is probably the biggest in terms of content. Some incredible movies have gotten premieres and sneak peaks, such as the one for Spider-Man 3 they had last year.

Atfer that, Gen Con (which is a gaming convention) would probably be next... but as you're looking for Science Fiction, DragonCon, in Atlanta, is probably the one you want.