Our world has changed. Especially the special world of security. Here's how to cope. Plus: Photo Q & A

Submit your photos for Photographer of the Week John Easley Congratulations John ...

Our readers have come up with some pretty funny ways to tell whether a diver is under the influence. Check out the top 10 signs your buddy Is narced.

Submit your photos for Photographer of the Week Robert Niemeyer Congratulations Robert ...

Submit your photos for Photographer of the Week Nick Hobgood Congratulations Nick ...

Submit your photos for Photographer of the Week Jay Treat Congratulations Jay Treat on ...

Submit your photos for Photographer of the Week Jackie Reid Congratulations Jackie ...

Should you breathe air, nitrox or trimix? It depends on the dive. See how nitrox and trimix stack up against the stuff you're used to inhaling.

Adhering to predive procedures is crucial when using a closed-circuit rebreather. Without a buddy to catch his mistake, one diver pays the ultimate price for carelessness.