Manuscript Preparation, Copyediting, and Proofreading

Q. This headline appeared in the New York Times on Friday, May 11: “A Tough Fight Still Looms, Cheney Warns G.I.’s in Iraq.” I thought no apostrophe was necessary here, as the s represents a plural, not a possessive. What’s up at the Times?

A. What’s up is that the Times uses New York Times style, not Chicago style. (Tsk!)

[This answer relies on the 17th edition of CMOS (2017) unless otherwise noted.]