A-10 Thunderbolt. Gun with an aircraft wrapped around it. Developed for destroying large Russian tank formations. it never saw the purpose fulfilled. However it has still proved very effective. Not fast but heavily armoured and pretected. The turbo fan sit high to protect them and give lee of a heat signal. The pilot sits in a titanium bath for protection.
Here's a rare sight: four out of the ten Nimitz-class aircraft carriers—the largest warships ever built—plus an Enterprise-class carrier docked together. They are resting at Naval Station Norfolk, Virginia, which coincidentally is the largest naval base in the world. Look at all that engineering and firepower. And it's only half of the Nimitz fleet!