Re: About "training" in Pakistan...?
Pakistan has a lot of training camps for the mujahideen along the LOC in the Kashmir region. These were very active and brimming with thousands of recruits during the pre 9/11 days when US and the whole world was indifferent on Terrorism.
Now-a-days due to increased international attention, many of the camps have been dismantled or re-located or disguised. Apparently one of the london bombers graduated from one of these colleges.