robert walker reports from rwanda. >> this man has had an iron grip on rwanda for more than a decade. now he is seeking seven more years in power. his rebel forces took control of the country in 1994. in the process, they stop the genocide, a wave of killing by militias against the minority. since then, the president has been credited with rebuilding rwanda. but his government is accused of crushing opposition, silencing the independent media, and even ordering the assassination of rivals. >> the shot him in the car. someone knocked on the car and shot him dead. >> we were beaten with clubs to the head all over. they smashed my head against a brick wall. >> the independent press does not exist. there is no freedom of association, no freedom of speech. >> there is growing international concern about rwanda. of the past two months, there has been a series of attacks on government critics at home and abroad. in june, the exiled former head of the rwandan army was shot in the stomach in johannesburg. he survived and accused the president of ordering the shooting. six days later, a journal