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L-3 MAPPS to Support AmerenUE with Callaway Plant’s Integrated Control System Upgrade

Montréal, June 7, 2010 – L-3 MAPPS announced today that it has won two orders from AmerenUE in support of the Siemens SPPA-T3000 integrated control system (ICS) upgrade for the Callaway nuclear plant in Callaway County, Missouri, USA. In support of the first order, L-3 MAPPS will simulate the instrumentation and control (I&C) system and corresponding human-machine interface and integrate it with the plant model that is currently being updated. For the second order, L-3 MAPPS will design and develop a test system that will be used to connect the Callaway plant simulator directly to the plant’s ICS as part of testing prior to final installation. The ICS will be installed to support the feedwater system at the Callaway nuclear plant during the plant’s next refueling outage in the fall of 2011.

L-3 MAPPS will provide a tool for the simulated ICS that will import I&C functional diagrams into its Orchid® Modeling Environment, automatically creating a simulation of the I&C. The tool will facilitate incorporation of future ICS modifications and upgrades to the simulator.

“L-3 MAPPS is pleased to leverage our extensive exposure to Siemens’ SPPA-T2000 DCS product in taking on the T3000 series,” said Michael Chatlani, vice president of marketing & sales for L-3 MAPPS Power Systems and Simulation. “We appreciate AmerenUE’s continued confidence in us and welcome this opportunity to build up our experience with the SPPA-T3000, which will certainly play an important role in new nuclear builds.”

The ICS test system is scheduled for delivery to the Callaway plant in the summer of 2010. The updated simulator, incorporating the simulated ICS, is slated to be operational in early 2011. When operational, the simulator will allow Callaway operators to train on the new ICS before the system is utilized for actual plant operations.

The upgrade of the feedwater control system is part of an effort to integrate multiple control systems. Other analog controls will also be replaced with the T3000 following the feedwater system upgrade.

In 2009, the Callaway Plant’s 25th anniversary, the plant generated more electricity than in any other calendar year. Its net generation of 10.2 million megawatt-hours was enough to supply the electricity needs of 780,000 average households. Callaway was the second largest power producer on the Ameren system—accounting for 21 percent of AmerenUE’s generation and 13.4 percent of total Ameren generation.

L-3 MAPPS, a division of the L-3 Marine & Power Systems group, has over 25 years of experience in pioneering technological advances in the marine automation field and over 35 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 website at www.L-3com.com/MAPPS.

Headquartered in New York City, L-3 Communications employs approximately 67,000 people worldwide and is a prime contractor in C3ISR (Command, Control, Communications, Intelligence, Surveillance and Reconnaissance) systems, aircraft modernization and maintenance and government services. L-3 is also a leading provider of a broad range of electronic systems used on military and commercial platforms. The company reported 2009 sales of $15.6 billion. To learn more about L-3, please visit the company’s website 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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