gary layne has more. >> reporter: was a day of jubilation. the capital city of the world's newest nation of south sudan. for more than 20 years, the people of the south, mostly black african christians, fought in civil war with northern arabs. they resisted sudanese effortses to force them to become muslim. >> people died and struggling to be free. the majority of the south are christians. these are people that paid with their life. shed their blood for the chance to be free. for me, we've been working here for over 20 years for many christian organizations, cbn has been involved here helping the people during the time of struggle. >> reporter: but u.s. alabama to the united nations peace between the north and south could be temporary. she said u.s. is concerned about unresolved issues. mostly over exact demarcation of the border and sharing of oil revenues. especially in the mountains threaten southern independence and still poses a danger. during a meeting south sudan president, it helped rebuild 433 churches in south sudan. a couple of the