"worldfocus" special correspondent mark litkehows us how that was accomplisd. >> reporte this is the hub of operations during the vieam war. reporter: for this woman, every day is a walk through history. >> that you can fort. >> rorter: she's the curat of the clark air forcease muse, formerly headquarters for e u.s. 13th air force, st north ofmanila. back en, she a well loved aid anspeech writer for a stng of american commander >> the good old days >> reporter: for aricans who served here at clarkand at the near naval base,hey were the good o days indeed. the most stregically important u.s. bases in t pacic. clk and stubing were a projection of americanilitary powe deep into asia. the plippines one of the best r & r pts. t it all came to an abrupt end in the early 1990s with two amatic events. an expsion of filipino nationalism demandg an end to the u.s. military pesencehere. and an most simultaneous exosion of neay mount pinatu which buried the bases undetons of voanic ash. the amecans were gone within a year. and nearly everyone assumed that clark and stubingere history, too. ll, j