Solar water pumps were a great business opportunity for women in northern Kenya--so great that as soon as businesses were profitable, men took over and shut women out of both the business, and sometimes access to water. Dorothy Aseyo from CARE Kenya talks about what she learned about how to pick technologies, pick partners, and make sure that when your goal is women having successful businesses, you don't set up systems for failure. Keeping track of who leads and adapting quickly are some of her key lessons