Magic bullets for understanding metastasis "have been proposed again and again, and nothing has ever held up, " says Richard Klausner, former head of the National Cancer Institute and now a principal at the ColumnGroup, a venture capital firm.
The Seleka fighters benefited from the growing dissatisfaction with Bozize, who came to power in 2003, at the helm of a column of a different rebel group which also invaded the capital and toppled the former leader.