Out for a four-month, 7,300-mile bike ride through Africa

Two days from now, just before dawn, at the confluence of the Blue and White Niles in Khartoum, Bina Bilenky Trahan and more than 30 other intrepid souls will be pushing off from the Sudanese capital, heading for Cape Town, South Africa. Their trip will clock in at 7,363 miles and take them through nine countries, across deserts and mountains, in searing heat and subtropical cool.