Hieroglyphic markings unseen for 4,500 years have been revealed by a robot explorer inside a secret chamber in the Great Pyramid of Giza. It's hoped that the markings may explain the purpose of the mysterious tunnel/chamber. More at CNN.
Filling in for George Noory, Dave Schrader (email) was joined by former CIA officer and security specialist Jason Hanson, who revealed spy secrets to staying safe and surviving various dangerous scenarios. Open Lines followed.