Pentagon Scientists Use ‘Time Hole’ to Make Events Disappear

Title bait, at its worst.

What they created is a convoluted (if somewhat cool) way of retarding light from reaching the observer, thusly masking the event. There's no "time shift" or anything of that sort involved.

Imagine I record an event and then replay it for you in a monitor, with a 20 second delay. Does that mean I 'erased' 20 seconds from history, or that I 'masked' the event? Nope.

As expected, crazy hyperbole of an interesting scientific discovery that will have totally different applications.

"According to Cornell scientists, it’d take a machine 18,600 miles long to produce a time mask that lasts a single second."