Complex sentence: Since its inception, a second ASPA Summit happened in Doha, Qatar, in March 2009, and a third Summit was held in Lima, Peru, on October 2nd, 2012, after being postponed, from February 2011, due to the Arab Spring uprisings.
Split into simpler sentences: Since its inception, a second ASPA Summit happened in Doha, Qatar, in March 2009. The III ASPA Summit was scheduled to be in Lima, Peru, in February 2011, but was postponed due to the Arab Spring uprisings.