The second tower (AKA East Ridge) of the Grand Tetons has partially collapsed. The East Ridge Tower stands at 13,775 feet high.
The collapse occurred last fall, but the news did not spread as quickly as one might think.
The original source and full article can be found here: Rockfall changes world-famous Teton skyline forever
Here are the before and after photos:
Beautiful article. Good work. God is ever changing our skyline.