American Science and Engineering, Inc.; Announces Middle Eastern Country Selects AS&E CargoSearch Technology for Border and Port Security.

Business/Technology Editors

BILLERICA, Mass.--(BUSINESS WIRE)--June 6, 2000

American Science & Engineering, Inc. (AMEX:ASE) announced today that a Middle Eastern Country has selected AS&E's CargoSearch(TM) technology for their border and port security. The order valued over $20 million is for three fixed-site CargoSearch X-ray systems and one MobileSearch(TM) X-ray system. The MobileSearch system is expected to be delivered in October 2000. AS&E will receive revenues from this order during its current and next fiscal year.

Ralph Sheridan, Chief Executive Officer and President, stated, "The selection of AS&E's CargoSearch systems is an example of this prestigious client's commitment to use technology to improve the effectiveness of their inspection protocols and secure their borders against potential terrorist threats and weapons smuggling. Historically, this Country's Government has played a strategic role in the Gulf as the host site for many Pan-Arab conferences. Their long standing commitment to security and the safety of Senior Government Officials attending these events is further evidenced by the selection of AS&E's technology for Cargo Inspection. We are very pleased to partner with them to achieve their security objectives."

The MobileSearch and Fixed-Site CargoSearch Systems are part of AS&E's family of cargo and vehicle inspection systems. These systems are solving an expanding range of inspection problems including detecting car and truck bombs, combating weapons smuggling, and imaging cargo to expose trade fraud. AS&E has delivered more X-ray cargo inspection systems than anyone in the industry, and continues to be the leader in X-ray detection technology and applications.

AS&E develops and manufactures sophisticated X-ray inspection products for critical detection and security applications. AS&E's patented Z(R) Backscatter technology detects plastic explosives, illegal drugs, and other contraband, even when artfully concealed in complex backgrounds by terrorists and smugglers. AS&E's High Energy Systems Division manufactures linear accelerators for a variety of applications including medical, scientific, security, electron beam curing and non-destructive testing. For more information on AS&E products and technologies, please visit the Company's web site at http://www.as-e.com.

Safe Harbor Statement

The foregoing press release contains statements concerning the Company's financial performance and business operations which may be considered "forward-looking" under applicable securities laws. The Company wishes to caution readers of this press release that actual results might differ materially from those projected in any forward-looking statements.Factors which might cause actual results to differ materially from those projected in the forward-looking statement contained herein include the following: significant reductions or delays in procurements of the Company's systems by the United States and other governments; disruption in the supply of any sole-source component incorporated into the Company's products (of which there are several); litigation seeking to restrict the use of intellectual property used by the Company; potential product liability claims against the Company; global political trends and events which affect public perception of the threat presented by drugs, explosives and other contraband; the ability of governments and private organizations to fund purchases of the Company's products to address such threats; and the potential insufficiency of Company resources, including human resources, capital, plant and equipment and management systems, to accommodate any future growth. These and certain other factors which might cause actual results to differ materially from those projected are more fully set forth under the caption "Risk Factors" in the Company's Registration Statement on Form S-3 (SEC File No. 333-9151).