i'm meg oliver. new details are emerging tonight about the daring evacuation of nearly 100 u.s. diplomatic personnel and their families from sudan's capital, khartoum. it was carried out by u.s. special forces as two top generals and their soldiers battle for control of the country. the violence has paralyzed the nation's airports and claimed more than 400 lives. thousands of americans, many of them dual citizens, remain caught in the crossfire. the mission began on saturday. three chinook helicopters flew from djibouti, refueled in ethiopia, then landed in sudan's capital, khartoum. after returning to djibouti, the americans were then flown to the u.s. military base in ramstein, germany. u.s. secretary of state antony blinken monitored the evacuation in washington. cbs's imtiaz tyab is tracking developments in london and leads us off. imtiaz. >> reporter: meg, good evening. the evacuation of u.s. embassy staff and their families has only intensified concern for the estimated 16,000 americans who still remain trapped in sudan as the fighting there becomes even deadlier. heavily

i'm meg oliver. new details are emerging tonight about the daring evacuation of nearly 100 u.s. personnel and their families from sudan's capital, khartoum. it was carried out by u.s. special forces as two top generals and their soldiers battle for control of the country. the violence has paralyzed the nation's airports and claimed more than 400 lives. thousands of americans, many of them dual citizens, remain caught in the crossfire. the mission began on saturday. three chinook helicopters flew from djiboutef

i'm meg oliver. >>> new details are emerging tonight about the daring evacuation of nearly 100 u.s.iplomatic personnel and their families from sudan's capital, khartoum. it was carried out by u.s. special forces as two top generals and their soldiers battle for control of the country. the violence has paralyzed the nation's airports and claimed more than 400 lives. thousands of americans, many of them dual citizens, remain caught in the crossfire. the mission began on saturday. three chinook helicopters fueled flew from djibouti, refueled in ethiopia and landed in khartoum. after returning to djibouti, the americans were flown to the u.s. military base in ramstein, germany. u.s. secretary of state anthony blinken monitored the evacuation from washington. cbs's imtiaz tyab is tracking developments in london and leads us off. >> meg, good evening. the evacuation of u.s. embassy staff and their families has only intensified concern for the estimated 16,000 americans who still remain trapped in sudan as the fighting there becomes even deadlier. >> reporter: heavily armed fighters from t