Mars Mission Insignia by ANewKindOfWater
I thrifted a similar t-shirt years ago, with only one dog head, that was already well-worn when I got it. So here is an attempt to resurrect it — rescanned direct from old shirt, with a new border, and an extra dog head for good measure.
If you recognize or know more about the source that would be good to know. Its similar to Bundswehr imagery, but I’ve found nothing through google images.
This design also available using the full width of the RedBubble template: 
Comments
Can you make the emblem bigger?
Roca – done and done — check it out here