KISUMU, Kenya (Reuters) - Some businesses in Kisumu, Kenya's third-largest city, have reduced stock or closed ahead of Monday's presidential elections for fear of a repeat of the tribal violence that killed more than 1,200 people at the last such vote five years ago. On the outskirts of the Lake Victoria port city, abandoned ruins still bear witness to the weeks of looting and torching that brought East Africa's biggest economy to a standstill. ...