King Tutankhamen’s army just lost a major battle. His subjects could be facing a terrible plague. Egypt's king probably has a lot on his mind as he goes to bed for the night. Suddenly someone leaps out of the shadows and strikes the king with a fatal blow to the back of the head. Tutankhamen’s nine-year reign comes to a quick and mysterious end. That's one of many theories about how Egypt's most famous king died at age 19. The puzzle has fascinated researchers since 1922, when British archaeologist Howard Carter discovered Tutankhamen’s 3,300-year-old tomb. Determined to find the answer, explorer Zahi Hawass used modern technology to put this old theory to the test. "I was almost trembling when I arrived at the tomb," Hawass says. His team of experts carefully removed King Tutankhamen’s mummy from its royal grave and placed it in a Computed Tomography (CT) scanner. The machine created detailed images of Tutankhamen’s mummy, which were reconstructed on a computer. That way scientists could examine Tutankhamen from any angle without damaging him.