Macky Sall, the former president of Senegal, talks about how he would help developing countries with their debt burden. Sall is one of six contenders looking to

Macky Sall, the former president of Senegal, talks about how he would help developing countries with their debt burden. Sall is one of six contenders looking to be the next United Nations secretary general. He speaks during a town hall event moderated by Bloomberg Television in the UN’s General Asse…