US, Sudan exchange ambassadors for first time in over two decades
Obstacles still ahead in establishing diplomatic relations between the two countries
Donald Booth, U.S. envoy to Sudan, gave no timetable, adding: "We want to make sure that what we see as a problem isn't continuing, and it depends on how long it takes for them to do that."(photo credit: REUTERS/EDUARDO MUNOZ)ByTARA KAVALER/THE MEDIA LINE