Join colleagues from around the world at the 2004 Annual Meeting of the American Association for Aerosol Research (AAAR), October 4-8, in Atlanta, Georgia. This year’s special symposia will focus on microdosimetry of inhaled particles and drug aerosols, aerosols in the southeastern region of the United States, aerosols and climate change, and heterogeneous and multiphase chemistry as well as highlighting the latest advances in aerosol science. To learn how you can attend, see the conference website.