Sudden Shift On Detainee
News analysis suggests that Pentagon's sudden decision to allow lawyer to visit Yaser Esam Hamdi, terrorism suspect who holds US citizenship, may be less substantive concession than calculated gesture to shield detention polices from reversal by courts; Hamdi was captured in Afghanistan and is held in Navy brig in Charleston, SC; photo; Viet Dinh, former assistant attorney general who helped draft policies, says shift moves Bush administration to more defensible position but that more due process is needed; decision comes day before Justice Department brief defending policies; Frank W Dunham Jr, public defender in Virginia, will be allowed to meet with Hamdi (M)
