Heavily-armed military officers yell at us to kneel on the ground in front of the shuttered shop fronts facing Kibuye roundabout in central Kampala as the jolting sounds of gunfire and stun grenades ring out. Dozens of soldiers gather to enforce the temporary detention. Some are in balaclavas, and others are bare-faced and berating. It is clear from their threats that journalists are as unwelcome as the protesters calling for an end to Ugandan President Yoweri Museveni's 40-year rule.