Just hit level 22 in BBC2. Now I only need 9 more demolish kills till platinum!
Thanks for the tip Getrdone. I've been using C4 and mortar on buildings to get the majority of mine. I think I got a few early on using tanks before I was trying for it, but people tend not to stick around when a tank is blasting holes in buildings. I'm surprised they stay inside sometimes when I'm dropping mortar. I also got a couple using kills using the UAV. When I fly high enough in the UAV people tend to forget about me and I can rain down missiles.