Which campain is longer you think?

I hope Halo: Reach is longer than Halo 3.

So far, Halo 2 has the longest campaign so far, with 15 distinct missions (including the opening cinematic and the first tutorial level.) Halo CE had 10 missions, and Halo 3 and ODST both had 10 (which the opening missions were cinematics.) I've heard rumors (and read on Halopedia) that Reach will have 10 missions as well (the first will also be a cinematic.) But as far as length in time goes, I believe Reach will be longer than Halo 3 (depending on the difficulty you choose.) There are as many missions as Halo 3, but the missions are supposed to take longer to complete. Which is okay with me, as long as they don't have any ridiculously annoying ones, like The Ark.