Strangely Familiar?

Here is a picture of the familiar old Civil Defense emblem, which was retired yesterday after almost 70 years of service. We Cold War kids remember it well, if not fondly:


Here is its replacement, the Emergency Management logo:

And here is the current symbol for DC Comics, publisher of Superman, Batman, Wonder Woman, etc.

Is it just me, or do logos #2 and #3 look an awful lot alike?

I leave it to your imagination to determine what this strange resemblance might mean, if anything...