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L-3 MAPPS to Provide Orchid® Reactor Model for Callaway Simulator

Montréal, December 20, 2007 - L-3 MAPPS, a subsidiary of L-3 Communications, announced today that AmerenUE has placed an order to replace the reactor core model on the Callaway Nuclear Plant Simulator. The reactor model for the Callaway Simulator is due to be in service in the spring of 2008.

The new real-time reactor core model, based on the Nodal Expansion Method (NEM), will be generated with L-3 MAPPS' Orchid® Core Builder software. With NEM, each node of the reactor core model is represented
by a fourth-order polynomial, providing a highly accurate representation of the flux in the reactor core. Orchid® Core Builder will also be delivered to AmerenUE for adapting the core model to incorporate plant
fuel cycle updates.

L-3 MAPPS has provided simulator update products and services to AmerenUE's Callaway Simulator for ten years. Through a series of projects over those years, the L-3 MAPPS team has upgraded several plant models, replaced the simulator environment and instructor station and supported the simulator staff with
on-site simulator maintenance services. Today, the Callaway Simulator is largely based on L-3 technology.

"We take great pride in our long-standing record of advancing the Callaway Simulator, and we are pleased that AmerenUE continues to place their trust in L-3 as we take on this new project," said Michael Chatlani, Vice President, Marketing & Sales, L-3 MAPPS Power Systems and Simulation. "Through our dedication to customer service and providing state-of-the-art simulation technology, we have been able to generate strong customer loyalty across our installed base - AmerenUE being a prime example of this."

AmerenUE, a subsidiary of St. Louis-based Ameren Corporation, is Missouri's largest electric utility, serving 1.2 million customers in central and eastern Missouri, including the St. Louis area. Callaway nuclear plant, which produces about 20 percent of AmerenUE's power, has consistently been an industry leader in both safety and performance. The plant's average annual net generation of 8.9 billion kilowatt-hours is equal to the amount of electricity used annually by more than 750,000 average households. Ameren Corporation is among the United States' largest investor-owned electric and gas utilities.

L-3 MAPPS has over 20 years of experience in pioneering technological advances in the marine automation field and over 30 years of experience in delivering high-fidelity power plant simulation to leading utilities worldwide. In addition, the company has more than three decades of expertise in supplying plant computer systems for Canadian heavy water reactors. L-3 MAPPS also provides targeted controls and simulation solutions to the space sector.

To learn more about L-3 MAPPS, please visit the company's web site at www.L-3com.com/MAPPS.

Headquartered in New York City, L-3 Communications employs over 63,000 people worldwide and is a prime system contractor in aircraft modernization and maintenance, C3ISR (Command, Control, Communications, Intelligence, Surveillance and Reconnaissance) systems and government services. L-3 is also a leading provider of high-technology products, subsystems and systems. The company reported 2006 sales of $12.5 billion.

To learn more about L-3 Communications, please visit the company's web site at www.L-3com.com.


SAFE HARBOR STATEMENT UNDER THE PRIVATE SECURITIES LITIGATION REFORM ACT OF 1995

Except for historical information contained herein, the matters set forth in this news release are forward-looking statements. Statements that are predictive in nature, that depend upon or refer to events or conditions or that include words such as "expects," "anticipates," "intends," "plans," "believes," "estimates," "will," "could" and similar expressions are forward-looking statements. The forward-looking statements set forth above involve a number of risks and uncertainties that could cause actual results to differ materially from any such statement, including the risks and uncertainties discussed in the company's Safe Harbor Compliance Statement for Forward-looking Statements included in the company's recent filings, including Forms 10-K and 10-Q, with the Securities and Exchange Commission. The forward-looking statements speak only as of the date made, and the company undertakes no obligation to update these forward-looking statements.

 


 

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