Khartoum, rest day
Break down the bikes and complete a deep cleanse of the pieces left behind. Sand and dust everywhere. Then, fuss over protecting and packaging bikes for shipping on plane.
This drags on to eat up pretty much the whole day!
In the end, also find some time to buy shaving cream, shower, shave, see doctor, and check into hotel room for one night (overpriced but more hygienic for treating saddle sore issue).
Large group of army officer stops by hotel for a snack in late afternoon and leaves behind an enormous mess.