As the UN celebrates the official launch of the post-2015 agenda with the Sustainable Development Goals and world leaders start laying out their views in the UN General Debate, much of this week in New York is about looking forward. But on the sidelines of the main events focused on the SDGs, peacekeeping, violent extremism and the Syrian crisis, many are using this week as an opportunity to look back at the past year. Namely, a year after the West African Ebola outbreak reached its peak, many are discussing what went wrong and how to better prepare for the next epidemic.