On July 15th at 11:25 six C-20 Short Launches took of from Yeager Airport and made their way to Snowstone four of them were carrying civilian supplies, one was carrying solely Charioteer APCs and one was carrying a Charioteer and a Crusader MK1.
I personally watched over this mission from ATC.
Here is a recording from the pilots after takeoff until landing at Avalanche.
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Pilot-1: Sir ready for takeoff
KPLball: Go ahead.
Pilot-1: Starting Engines
Engines: WHIRRRRRRRRRR

Pilot-1: Plane is steadily reaching 100 kph.
Co Pilot-1: WE HAVE LIFT OFF
KPLball: Head towards Bandit then head at heading 345 North West.
Pilot-:2 Affirmative.
13 minutes later
Pilot-1: We are nearing Snowstone.
Pilot-6 : Look at that it's getting very dark!
Pilot-3 : That's because their is a radiation Cloud.

Pilot-4 : Get ready to dawn hazmat suits upon touch-down.
4 minutes later
Pilot-5 : Clear the Runway I'm getting ready for touch-down.

2 minutes later

APC driver : ready for the supplies.
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Upon touch-down the sixth C-20 opened it's cargo bay and out came my most promising tank commander ,Johnathan "Hunter" H. Dimitri, Who at the time had not even faced an enemy tank in combat. The reason he is here is for three reasons; to protect Samuel, to clear the way of rumble for the Charioteers, and to find a tank my spies told me about, The Imperial Cheetah.

The APCs we're here to take care of transporting the supplies for the Civilians.
Each C-20 carried 50 Tons of supplies. Enough to ration them out to starving citizens. The other reasons the APCs we're here was to get rid of heavily contaminated material. Some Doctors who know how to treat radiation poisoning also came along to treat the civilians. From now on, every week until this fallout is over C-20s will be bringing medical supplies to help treat civilians.

After an hour of unloading the C-20s took off again.

As they were on their way back a C-19 Hefty radioed them.
Here is the radio call.
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C-19 Hefty : Yo Ghoul Riders! How are ya
Pilot-1 : Just fine actually. What you doin out here circling Avalanche?
C-19 Hefty : I was waiting for you guys to get off the Runway. I've got supplies to feed people for weeks. What were you guys carrying?
Pilot-3 : We were carrying Medical supplies and other stuff for the civilians.
C-19 Hefty : Nice! Alright I've got to land. SEE YA!
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This radio chat was a conversation between freinds as you can see.
Here is a picture taken by Pilot-5.

You can clearly see the C-19 Hefty circling Avalanche and coming in on his final run.
As they were leaving Snowstone Pilot-6 took this photo of editing the radiation cloud.

When they made it back they were immediately tested for radiation poisoning but they did not. And because of the C-20 special paint the Nuclear fallout did not effect it in the slightest.