3RD IWA DEVELOPMENT CONGRESS & EXHIBITION The IWA Development Congress and Exhibition provides a unique opportunity to signpost best practices, applied research and enabling policies to meet the water and sanitation challenges of today and tomorrow in an increasingly urbanizing world. The learning outcomes from the 2nd IWA Development Congress and Exhibition in 2011 reaffirmed some our traditional understandings but also challenged conventional thinking about how we better prepare ourselves for an uncertain future.