THOMAS Tumusifu Buregeya wishes he were studying for his final school exams. Instead, he scrapes a living doing odd jobs in a displaced people's camp in the eastern Democratic Republic of Congo after a wave of rebel violence upended his life yet again. Buregeya fled the town of Kibumba with his family in October amid a renewed offensive by the M23 rebel group - the third time in 15 years he has been forced to escape his home and has not been able to study for a whole year. He is now 22 and still waiting to complete school. "When…