Seems like a lot of Iridiums are undergoing re-entry.
Q said the Norks were using them for missile guidance, and that we fooled with a launch of some Iridiums around Christmastime that Elon Musk/Space-X was involved in.
I vaguely recall a recent upgrade of the Iridium constellation. Thought it a bit odd, in that the original one was a losing business proposition.