There are tons of examples of this. Examples:
- If a US citizen conspires to insider trading with another US citizen on US soil regarding an Australian company, the Australian government will claim jurisdiction through the Corporations Act because it is an Australian security;
- There is a "sex tourism" problem in several South-East Asian countries that involves children. These pedophiles have historically been rarely if ever prosecuted in those countries for various reasons. The Australian government passed a law saying that if you are an Australian citizen and engage in this sort of activity you can be criminally charged in Australia.
> Adding insult to injury, publishing leaked military secrets is not even illegal in the U.S. due to the first amendment right to a free press
It's not as simple as that. Let me give you some escalating hypotheticals:
1. A journalist receives some classified material in the mail and publishes it after vetting it (eg journalists typically won't publish details that will risk the lives of those currently in the field);
2. A journalist meets with a source that has access to classified material and asks for anything concerning, say, Benghazi. These materials have already been obtained;
3. A journalist looks for and finds such a source;
4. A journalist tells a source what to look for and these materials have not yet been obtained;
5. The journalist provides direction on what to find and leak and provides material aid in that effort. This could include providing hacking tools, contacts, security protocols, etc.
(1) is a journalist. (5) has committed a crime. The line between criminal and journalist is somewhere in between that we debate.
My point is that the first amendment isn't a universal shield. Assange is much closer to (6) than (1) here.
EDIT: corrected list numbering.