Exhibit31.1

CERTIFICATION

I, Frank C. Lanza, certifythat:

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| 1.  | I have reviewed this annualreport on Form 10-K of L-3 Communications Holdings, Inc. and L-3Communications Corporation; |

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| 2.  | Based onmy knowledge, this report does not contain any untrue statement of amaterial fact or omit to state a material fact necessary to make thestatements made, in light of the circumstances under which suchstatements were made, not misleading with respect to the period coveredby this report; |

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| 3.  | Based on myknowledge, the financial statements, and other financial informationincluded in this report, fairly present in all material respects thefinancial condition, results of operations and cash flows of theregistrants as of, and for, the periods presented in this report; |

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| 4.  | The registrants’ other certifyingofficer and I are responsible for establishing and maintainingdisclosure controls and procedures (as defined in Exchange Act Rules13a-15(e) and 15d-15(e)) and internal control over financial reporting(as defined in Exchange Act Rules 13a – 15(f) and 15d-15(f))forthe registrants and have: |

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|  | a)  | Designedsuch disclosure controls and procedures, or caused such disclosurecontrols and procedures to be designed under our supervision, to ensurethat material information relating to the registrants, including theirconsolidated subsidiaries, is made known to us by others within thoseentities, particularly during the period in which this report is beingprepared; |

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|  | b)  | Designed such internalcontrol over financial reporting, or caused such internal control overfinancial reporting to be designed under our supervision, to providereasonable assurance regarding the reliability of financial reportingand the preparation of financial statements for external purposes inaccordance with generally accepted accounting principles; |

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|  | c)  | Evaluated the effectiveness of theregistrants’ disclosure controls and procedures and presented inthis report our conclusions about the effectiveness of the disclosurecontrols and procedures, as of the end of the period covered by thisreport based on such evaluation; and |

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|  | d)  | Disclosed in this report any change inthe registrants’ internal control over financial reporting thatoccurred during the registrants’ fourth fiscal quarter that hasmaterially affected, or is reasonably likely to materially affect, theregistrants’ internal control over financial reporting; and |

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| 5.  | The registrants’ other certifyingofficer and I have disclosed, based on our most recent evaluation ofinternal control over financial reporting, to the registrants’auditors and the audit committee of the registrants’ board ofdirectors (or persons performing the equivalent functions): |

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|  | a)  | All significant deficiencies andmaterial weaknesses in the design or operation of internal control overfinancial reporting which are reasonably likely to adversely affect theregistrants’ ability to record, process, summarize and reportfinancial information; and |

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|  | b)  | Anyfraud, whether or not material, that involves management or otheremployees who have a significant role in the registrants’internal control over financial reporting. |

Date:March 9, 2006

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| /s/ Frank C. Lanza                                |
| Frank C. LanzaChairman and Chief ExecutiveOfficer |
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