Being men and women of the outdoors, we prefer as many different choices for shading our eyes as possible.

But carrying multiple sunglasses with various types of lenses is a hassle. So we bring one pair, and when the sun ducks behind a cloud or falls into the trees, we place our shades on top of our heads or in our shirts. Of course, that’s when the klutz in all of us comes out.

Here to solve our decidedly first-world problem is Oakley, with its Fast Jacket sunglasses. The Orange County, California-based company has developed a system that matches one frame to multiple, interchangeable lenses.

It...

Yesterday, the press had one of its semi-regular terrorism panics, this time over the warning that jihadists are thinking about sewing bombs into wannabe martyrs. Relax, an explosives specialist at the Department of Homeland Security writes in an e-mail to Danger Room. If Al-Qaeda and company are turning to cockamamie ideas like surgically-implanted explosives, it’s a sign that the terrorists are in very, very bad straits.

Sure, it’s a bit of self-interested argument. But the note was interesting enough, I thought I’d run it in full.

Say what you want about the Transportation Security...