hishem melhem, rami khouri, tarek masoud, thank you all very much. >> woodruff: still to come on the newshour: the auditions by conservative 2012 presidential contenders; plus, shields and brooks. but first, the other news of the day. here's kwame holman. >> holman: more than 100 people have died in the last two days of fighting in southern sudan, a military spokesman confirmed today. the casualties came when a breakaway militia faction ended a cease-fire wednesday, and carried out attacks in two towns. no new fighting was reported today. southern sudan will become an independent nation in july. in pakistan, police charged an american embassy employee detained there committed "cold-blooded murder". raymond allen davis is in custody for shooting two pakistanis last month in lahore. he said they were trying to rob him. a pakistani judge today extended his detention by two weeks, despite u.s. claims that he has diplomatic immunity. a new protest against releasing davis erupted today in karachi. hundreds of islamist demonstrators took to the streets, calling for him to be hanged. the oba