I took that from Museveni's Facebook page the mouth of the horse himself! Whether I am a liar or not i shouldn't be blamed for quoting a reliable official page in other words, Yoweri Kaguta Museveni's page on FB says so! And I can't speculate on their decision but what I know Kagame has made up his mind on the route Rwanda chose aside agreements with Tanzania have been already signed including construction timeframe for Kigali-Isaka SGR.