User blog comment:NeverToWalkAlone/Halo 5, thoughts?/@comment-4207461-20130610220937

I also noticed one more thing...

If you watch at the part where the Chief looks at Cortana's memory chip, you can see that his hand (not including the jointed segments) is missing some armor pieces. And everyone can notice the crack covering a third of his visor. Also taking into account that he is walking with a limp, it would be safe to assume that his armor has been﻿ compromised. Maybe he's missing the whole chestpiece for all we know. That would certainly disable his suit's functions. Maybe that's why he's wearing a cloak