Alexander ran the agency when Edward Snowden leaked documents revealing the depth of its surveillance programs.
Andrew Burton/Getty Images Amazon said Wednesday it's appointed former National Security Agency chief Keith Alexander to its board of directors. Alexander will serve on Amazon's audit committee, the internet retail giant said in a filing with the US Securities and Exchange Commission. Alexander came under fire during his time as head of the agency after former NSA contractor Edward Snowden leaked secret documents in June 2013 revealed the depth of NSA spy programs' collection of data on US citizens, world leaders and others around the world. The disclosures led to backlash against the…