>>23601992
I don't know, man. What type of proof would you even be willing to accept? The fact is that all military pilot courses will include training with small arms at least at some point of the course. Even the Navy OCS(?) that you like touting about includes weapon familiarization, meaning that they do indeed learn how to use infantry weapons. You can check this online if you want to, there was a thread on AirWarriors.com talking about it. While you don't get qualified at Navy OCS, you do get to learn the basics through familiarization. Weapons Qualifications are mainly an US military thing that they need to complete before every assignment. They don't carry weapons all the time, but neither does any soldier. They qualify and carry them when they need to, so yes, it is indeed part of their job to know how to use weapons. And if they get issued weapons, than yes, it is indeed required for them to carry it. I found some former pilots mention they didn't want to go over the hassle of taking it with them, and sometimes didn't fly with them in combat, but I honestly found no source pointing towards it being a voluntary choice given by the military, more than pilots just not bothering to follow instructions.
As for whether it's normal for them to fight on foot, than no, it's not normal, just like it's not normal for a military truck driver to fight on foot. However, if the situation arises, they do indeed need to fight on foot and use firearms like normal infantry. If the air base security gets overrun or flanked, they need to be prepared to fight to defend themselves and their comrades-in-arms, and the base. If an enemy force manages to somehow make its way to a carrier, and the security gets overrun, it's a basic duty for every sailor and officer to arm themselves and join the fight to beat back the enemy. Aviators' main duty is to support and fight by using their aircraft, but a threat from the ground might straight-up stop them from performing their role.