[zeestephen]

Re: It is there in the original source code for the page...

I went through “Inspect Element” line by line.

I don’t see anything there that relates to a folded flag image.

[Biggirl]

I see a screenshot. That is enough.

[Spktyr]

Then your browser isn't loading the whole page. The link when you click on the flag is: https://www.google.com/doodles/redirect?doodle=122734574&flag

Link to the flag graphic itself is: https://www.google.com/logos/2019/memorialday19/flag.png

If you're not seeing that in the source code, your browser is simply not loading the whole page for whatever reason.