 ACA, which grew out of four Angel Organization Summits  convened by the Ewing Marion Kauffman Foundation in 2002 and 2003, sponsors an annual summit meeting in a different city each year at which the leaders of the major organized angel groups, together with government leaders, academics and venture capitalists, share best practices and build new ideas based on this knowledge.ACA has become the nationally recognized voice of the angel investment community in the US, mirroring the role that the National Venture Capital Association plays for the venture community.ACA is the official US representative member of the World Business Angels Association.