Tribal elders from territory that Al-Shabab controls were meeting with Somali government officials in a hotel to discuss cooperation in the war against Al-Shabab when a Land Cruiser exploded out front, followed by gunmen attacking. When the siege was over, people on both sides had been killed. Mohamed Gabobe, a reporter in Mogadishu, walks through what happened, what it means for the offensive against the group and the US role in Somalia.