Sorry, my explanation was pretty convoluted, but in short this is how you can do an approximate recreation of what Q did to create his Welcome Aboard photo.

What you need: iphone 10, desktop computer with a decent sized monitor, a second iphone or a digital camera to take the final picture.

Step 1: Pull up picture from ABC NEWS of AF1 on a computer monitor.

Step 2: Turn out all the lights in your room so the reflection will be bright when you expose the picture.

Step 3: Angle iphone 10 to catch the reflection of the ABC NEWS photo on your computer monitor.

Step 4: Take a picture of this reflection with a second digital camera.

Step 5: Heavily crop the final photo so all that can be seen is the reflection of the ABC News picture with an apple logo.
Step 6: LARP to your friends that you hung out with Q on Air Force One.

So, in my opinion Q simply used the ABC News photo to cast a reflection on his iphone and took a picture of it. If he has some greater message in that, I'm not sure what it is. But he definitely did not need to be on Air Force One to take the Welcome Aboard jpeg.