The Government of Israel agreed with Lockheed Martin Aeronautics Company to purchase more than 50 additional F-16 aircraft. According to business correspondent Seth Vogelman, the aircraft are being purchased in a follow-on order to the 50 ordered by Israel in 1999 and will be produced in the same advanced, two-seat F-16 I configuration. Deliveries will be in 2006, following completion of the 50 aircraft that were already on order, and will be completed in 2009. Total value of this purchase is approximately $2 billion. The aircraft will include a number of systems produced by Israeli industry and will be powered by the Pratt & Whitney F100-PW-229 engine. The Israeli Ministry of Defense and Lockheed Martin reached an agreement in principle for the sale at the Paris Air Show at the Le Bourget airport in France. Formal governmental agreements are set to be completed later. Israel has the world's largest F-16 fleet outside the United States Air Force.