April 2-5: National Congress on Aviation and Space Education 2003. Sponsor: the Civil Air Patrol. Hilton Cincinnati Netherland Plaza, Cincinnati. See www.capnhq.gov

April 6-8: Seventh Annual Helicopter Association of Canada's Convention and Exhibition. Hyatt Regency Hotel, Vancouver, British Columbia. See www.h-a-c.ca

April 7-8: Network Centric Warfare Conference. The conference focuses on the network-centric requirement of the U.S. military. Arlington, Va. See www.technologytraining.com

April 7-10: U.S. Space Foundation National Space Symposium. This conference integrates commercial, civil and national security sectors of space. The Broadmoor, Colorado Springs, Colo. See www.spacesymposium.org

April 9-12: Army Aviation Association of America's Annual Convention. This year's theme is "The Army Aviation Branch: 20 years of history; transforming the future." Fort Worth, Texas. See www.quad-a.org

April 27-30: American Association of Airport Executives' 75th Annual Conference and Exposition. The event caters to airport executives interested in seeing equipment, products and services designed for daily operations at airports. Los Angeles. See www.airportnet.org/annual2003

April 29-30: Air Cargo Management Group's Air Cargo and Freighter Aircraft Workshop. A venue for learning about the growing air freight and express industry. Elliot Grand Hyatt Seattle, Seattle. See www.cargofacts.com

April 28-30: Seventh Annual Airline Purchasing and Aviation Suppliers Conference and Exposition. This event is dedicated to airlines and their purchasing needs. London. See www.aviationindustryconferences.com

May 13-15: World Airline Training Conference and Trade Show. The event focuses on the latest airline training methods and technology. Palais des Congrès, Montréal. See www.halldale.com

May 14-16: The 4th Annual Aviation Security Summit and Expo. This event features discussions on topics that confront the aviation security industry. Atlanta. See www.worldrg.com/aw314

May 15-17: Sea-Air-Space Exhibition 2003. The U.S. Navy League sponsors this event, which features in part advanced technologies and seminars on U.S. Navy and Marine Corps programs. Marriott Wardman Park Hotel, Washington, D.C. See www.sasexpo.org/2003

May 15-18: International Aviation, Maritime and Defense Exhibition. The event bills itself as a catalyst for trade negotiations and the development of vital linkages between sellers and buyers in upgrading their aviation, maritime and defense capabilities. Philippine Trade Training Center, Manila, Philippines. See www.adsi-inc.com

May 18-21: 2003 Regional Airline Association Annual Convention. A trade show of products and services associate members offer to regional airline operators. Includes technical sessions with presentations by airline, industry and government representatives. Phoenix Civic Plaza, Phoenix. See www.raa.org

May 20-22: Aerospace Coatings Removal and Coatings Conference. The U.S. Air Force Corrosion Prevention and Control Office and the Southwest Research Institute in part sponsor this event. The conference features paint removal techniques, new technology updates and environmental regulations. Colorado Springs, Colo. See dodconf.swri.org

June 4-5: Aviation Industry Conferences' 7th Annual Latin America Airline Engineering and Maintenance Conference. Miami. See www.aviation-industryconferences.com

June 10-13: UAV 2003 Conference and Exposition. The Unmanned Vehicle Systems Association sponsors this event. Equinoxe Event Center, Paris. See www.euro-uvs.org

June 15-22: The 45th Paris Air Show. More than 300,000 visited the last Paris Air Show, held in 2001, of which 120,000 were trade visitors and 185,000 were from the general public. Le Bourget, Paris. See www.paris-air-show.com

June 16-20: FAA In-flight Icing and Ground De-icing International Conference and Exhibition. The Federal Aviation Administration and NASA in part sponsor this event. Chicago. See www.sae.org/icingdeicing

The above listings are assembled for the convenience of readers of Boeing Frontiers only and do not constitute an endorsement by The Boeing Company. Times, dates and subject matter are subject to change or cancellation. If you have any items you wish to have considered for the Frontiers Calendar, please e-mail them to boeingfrontiers@boeing.com, or send them by regular mail to Boeing Frontiers magazine, 100 N. Riverside, MC: 5003-0983, Chicago, IL 60606-1596.