This report discusses the F-35 Joint Strike Fighter (JSF), also called the Lighting II, which is a new strike fighter being procured in different versions by the Air Force, Marine Corps, and Navy. It details the Obama Administration's proposed FY2010 defense budget requests for F-35 program funding and outlines the issues that Congress must consider when deciding whether to approve, reject, or modify the administration's funding requests.

This report analyzes the FY2010 request, recent-year funding trends, and congressional action for FY2010, which includes the July 9 House approval of H.R. 3081, the State-Foreign Operations Appropriations bill for FY2010, July 9 Senate Appropriations Committee passage of its bill (S. 1434), and passage of H.R. 3288, the Consolidated Appropriations Act, 2010, signed into law Dec. 16, 2009 (P.L. 111-117).