Nigerian President Muhammadu Buhari returned home on Saturday from three months of medical leave in Britain where he received treatment for an unspecified ailment. Buhari's leave, which began on May 7 and was his second this year, left many in Nigeria questioning whether he was well enough to run the country. The refusal of officials to disclose the nature of the ailment has led to speculation about the illness. Channel Africa's Collins Nosa Atohengbe reports from Lagos