Taking 'By this time, Bin Ladin was well-known and a senior figure among Islamist extremists, especially those in Egypt, the Arabian Peninsula, and the Afghanistan-Pakistan border region.' as a given, does it logically imply 'At this point Bin Laden had gained prominence in the radical Islamist realm particularly in areas like Pakistan, Afghanistan and Egypt.'
By this time, Bin Ladin was well-known and a senior figure among Islamist extremists, especially those in Egypt, the Arabian Peninsula, and the Afghanistan-Pakistan border region.###At this point Bin Laden had gained prominence in the radical Islamist realm particularly in areas like Pakistan, Afghanistan and Egypt.