Caterpillar engineers Josh Crow (R), Derek Samsel (L) and Madan Jalla (C) check over the new electric drive power train simulator located at Caterpillar's Product Development Center of Excellence in Mossville, Illinois August 5, 2009. Nearby Peoria's main employer, Caterpillar Inc. has laid off, bought out or retired about 34,000 workers globally over the past year as demand for its earth-moving equipment declined along with economic growth. Picture taken August 5, 2009. Reuters Pictures logo Reuters Pictures 30 months ago

Caterpillar engineers Josh Crow (R), Derek Samsel (L) and Madan Jalla (C) check over the new electric drive power train simulator located at Caterpillar's Product Development Center of Excellence in Mossville, Illinois August 5, 2009. Nearby Peoria's main employer, Caterpillar Inc. has laid off, bought out or retired about 34,000 workers globally over the past year as demand for its earth-moving equipment declined along with economic growth. Picture taken August 5, 2009.