Manufacturing advanced Block 4 F-35 electronic warfare systems to defeat evolving threats | BAE Systems
British Government Says It Might Pass On $27M Upgrade For Some Of Its F-35s
New Electronic Warfare Suite Top Feature Of F-35 Block 4, Air Combat Boss Says
Finland Formalizes Deal for 64 Block 4 F-35s | Air & Space Forces Magazine
GAO Finds Increased Delays and Costs for F-35's Block 4 Modernization - Avionics International
US Confirms 'Highly Classified' Electronic Warfare (EW) Suite For F-35 Stealth Fighter's Block 4 Upgrade
View topic - F-35 Block 4 • F-16.net
Why is the F35 block 4 upgrade taking forever? Aren't faster processors available in the commercial market and the sidekick missile launch system is not difficult to incorporate in the F-35? -
View topic - F-35 Block 4 • F-16.net
Lockheed nabs $1.8B for F-35 Block 4 software development, testing - UPI.com
Update: F-35 Block 4 Upgrades and New F-35B At-Sea Users - Naval News
Update: F-35 Block 4 Upgrades and New F-35B At-Sea Users - Naval News
Lockheed Martin F-35 Lightning II - Wikipedia
F-35 Block 4 Modernization Delay Believed To Be Difficult To Fight Chinese Stealth Fighter Jets - YouTube
F-35 Block 4 Upgrades - YouTube
The Latest Variant of the F-35 Block 4, Major Enhancement which Still Has Critical Defects - YouTube
Block 4: How the F-35 Keeps Getting Better (And Deadlier) - 19FortyFive
GAO Report on F-35 Joint Strike Fighter Cost Growth, Engine Modernization - USNI News
Manned-Unmanned Teaming Eyed For F-35 Block 4 | Aviation Week Network
F-35 Production Deal is Largest in DOD History; Block 4 Contract Also Inked | Air & Space Forces Magazine
The most sensible option to achieving Block 4 readiness in F-35s
Inside Block 4—The Mostly Secret Plan For Making The F-35 Fighter Even More Lethal
One-third of F-35s could be delivered before operational testing is complete
Lightning Reflexes - Armada International
