Item 2. PROPERTIES.

Our principal executive offices are located at owned facilities in Melbourne, Florida. As of December 31, 2021, we operated approximately 300 locations in the U.S., Canada, Europe, Oceania, Asia, the Middle East and South America, consisting of approximately 22 million square feet of manufacturing, administrative, R&D, warehousing, engineering and office space, of which we owned approximately 9 million square feet and leased approximately 13 million square feet. There are no material encumbrances on any of our owned facilities. As of December 31, 2021, we had major operations at the following locations:

Integrated Mission Systems — Greenville, Waco and Rockwall, Texas; Camden, New Jersey; Mirabel and Hamilton, Canada; Mason, Ohio; Tulsa, Oklahoma; Philadelphia, Pennsylvania; Salt Lake City, Utah; and Anaheim, California.

Space & Airborne Systems — Palm Bay, Melbourne and Malabar, Florida; Rochester and Amityville, New York; Clifton, New Jersey; Van Nuys and San Diego, California; Colorado Springs, Colorado; Fort Wayne, Indiana; Wilmington, Massachusetts; and Alpharetta, Georgia.

Communication Systems — Salt Lake City, Utah; Rochester, New York; Londonderry, New Hampshire; Lynchburg, Virginia; Tempe, Arizona; Farnborough, United Kingdom; Brisbane, Australia; and Sunrise, Florida.

Aviation Systems — Menlo Park and Anaheim, California; Cincinnati, Ohio; Herndon, Virginia; Crawley, United Kingdom; Melbourne, Florida; Plano, Texas; Mt. Olive, New Jersey; and Grand Rapids, Michigan.

Corporate — Melbourne, Florida; and Washington, D.C.

The following is a summary of the approximate floor space of our offices and facilities in productive use, by segment, at December 31, 2021:

In our opinion, our facilities, whether owned or leased, are suitable and adequate for their intended purposes, are well-maintained and generally in regular use and have capacities adequate for current and projected needs. We frequently review our anticipated requirements for facilities and will, from time to time, acquire additional facilities, expand existing facilities and dispose of existing facilities or parts thereof, as management deems necessary. For more information about our lease obligations, see Note 18: Lease Commitments in the Notes. Our facilities and other properties are generally maintained in good operating condition.