Lockheed Martin Corp. plans to cut 4,000 jobs over the next 18 months as the company restructures its space business and continues its response to the uncertainty over domestic and international defense spending.

The world's largest defense contractor by sales plans to trim its workforce of 116,000 by another 3.4%, closing three U.S. facilities and restructuring an unspecified number of other plants as wrangling continues over the size and shape of the Pentagon budget.

...