The CNN article doesn't seem to add any more detail than was already present in the Atlas Obscura article. Both cite the same paper, which is http://onlinelibrary.wiley.com/doi/10.1111/maps.12664/full .

AO has a better picture of the dagger, and mentions that the other two iron items in Tutankhamun's tomb were also likely of meteoric origin, and different meteors at that. The CNN article has an annoying auto-play video.