Darfur has been embroiled in conflict since 2003. One impact of the fighting is that refugees often don't have access to clean drinking water. A group of college students in Boston has been raising money to build deepwater wells to supply cleaner water.
Thousands of Sudanese expats in the US are spending their days and nights online these days - getting little sleep, calling home multiple times a day, checking on the safety of their family and friends - hoping for good news.
Sudan's President Omar al-Bashir has ruled out talks with South Sudan on the simmering border conflict that has prompted fears of all-out war. Earlier, Sudanese jets bombed a border area in South Sudan.