Editing 1928 (section)

===July===
{{Main|July 1928}}
* [[July 2]] – [[Charles Jenkins Laboratories]]' [[W3XK]] station begins broadcasting on 6.42 [[megahertz|MHz]], using 48 lines.
* [[July 3]] – Scottish inventor [[John Logie Baird]] demonstrates the world's first [[colour television]] transmission in Glasgow.<ref>{{cite book|title=The Hutchinson Factfinder|publisher=Helicon|year=1999|isbn=1-85986-000-1 }}</ref>
* [[July 7]] – The first machine-sliced and machine-wrapped loaf of bread is sold in [[Chillicothe, Missouri]], United States, using [[Otto Frederick Rohwedder]]'s technology.<ref>{{cite book|title=Milling & Baking News|url=https://books.google.com/books?id=B6wnAQAAMAAJ|date=March 2008|publisher=Sosland Pub|page=40}}</ref>
* [[July 17]] – [[José de León Toral]] assassinates [[Álvaro Obregón]], president-elect of Mexico.<ref name=Obregon />
* [[July 25]] – The United States recalls its troops from China.
* [[July 28]] – [[August 12]] – The [[1928 Summer Olympics]] are held in [[Amsterdam]],<ref>{{cite book|author=United States Olympic Committee|title=Report: Games of the Olympiad|url=https://books.google.com/books?id=MQSCAAAAMAAJ|year=1961|publisher=United States Olympic Committee|page=22}}</ref> opening with the lighting of the [[Olympic flame]]. Women's [[sport of athletics|athletics]] and [[gymnastics]] debut at these games, and [[discus throw]]er [[Halina Konopacka]] of Poland becomes the first female Olympic gold medal winner for a track or field event. [[Coca-Cola]] enters Europe as sponsor of the games.<ref>{{cite book|author=Steinar Bryn|title=The Americanization of Norwegian Culture|url=https://books.google.com/books?id=w-8s8AZyZ3MC|year=1993|publisher=University of Minnesota|page=207}}</ref>