Somali soldiers prepare to secure the capital on the eve of presidential elections, at a police academy in Mogadishu, Somalia Tuesday, Feb. 7, 2017. Graft – vote-buying, fraud, intimidation – is the top concern in a nation that Transparency International now rates as the most corrupt in the world and Mogadishu is in lockdown because of the threat of violence by homegrown Islamic extremist group al-Shabab.