So how has the search for Osama going or has national taken A.D.D. taken over?

I find it extremely interesting that # 2 on the most wanted list, Mullah Omar lived openly in Qetta Pakistan until January 2009. If we were so interested in getting him why did we not simply take him out as stood in the market place watching convoys carrying supplies for US troops drive through town? What happened in January 2009 that would make him go back to hiding?