U.S. SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 8-K

Current Report Pursuant

to Section 13 or 15(d) of the

Securities Exchange Act of 1934

Date of Report (Date of earliest event reported) September 26, 2011

AMERICAN SCIENCE AND ENGINEERING, INC.

(Exact Name Of Registrant As Specified In Its Charter)

MASSACHUSETTS

(State or Other Jurisdiction of Incorporation)

1-6549		04-2240991
(Commission File Number)		(I.R.S. Employer Identification No.)

829 MIDDLESEX TURNPIKE, BILLERICA, MASSACHUSETTS		01821
(Address of Principal Executive Offices)		(Zip Code)

(978) 262-8700

(Registrant’s Telephone Number, Including Area Code)

N/A

(Former Name or Former Address, if Changed Since Last Report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

o Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

o Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

o Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

o Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

ITEM 8.01. OTHER EVENTS.

On September 26, 2011, American Science and Engineering, Inc. issued a press release announcing the receipt of a $34.9 million order for multiple Z Portal® vehicle screening systems from an undisclosed client to be deployed by officials at multiple border crossings to inspect vehicles and trucks. A copy of the press release issued on September 26, 2011 regarding the order is filed as Exhibit Number 99.1.

ITEM 9.01 EXHIBITS.

Exhibit Number		Description

99.1		Press Release dated September 26, 2011.

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

Date: September 26, 2011	AMERICAN SCIENCE AND ENGINEERING, INC.

	By:	/s/ Patricia A. Gray
	Patricia A. Gray
	Senior Vice President and General Counsel

EXHIBIT INDEX

Exhibit Number		Description

99.1		Press Release dated September 26, 2011.