    Sentence't::Fhough Bin Ladin's destination was:  Afghanistan, Pakistan was the nation: that held,  the'key. to his ability to use, Afghanistan as:a  base . from. “which: to’ revive” his ambitious  enterprise for war: against the Unitéd:States:         Sentence 2: Pakistan's . geography..made” it  necessary to’ gain. Pakistani. support before he    could carry out his operations,