...not absolutely sure, but something big and heavy came off this Sudanese Boeing 707 just before it crashed at Sharjah, UAE two days ago. You can see it in this video, although you have to watch carefully.
It's a well-documented issue on the 707 and the KC-135, although there have been several different reasons why it happened. A key issue is that the loss of one engine sometimes leads to the loss of the adjacent one - although again for different reasons.
The 707 is the granddaddy of commercial jet aviation: The most modified plane ever built and, by most accounts, the plane that made Boeing what it is today. It is also very, very old. And only still in use in a number of smaller foreign countries that don't actually make their own planes. So fortunately for you, if Daly's hunch is proven true, and the 707 does have a small problem with falling engines, you'll likely only encounter one the next time you fly Zambia Air, Sudan Airways or with the Argentine Air Force.