Editing 1928 (section)

===April===
{{Main|April 1928}}
* [[April 10]] – ''[[Pineapple Primary]]'': The United States [[Republican Party (United States)|Republican Party]] primary elections in Chicago are preceded by violence, bombings and assassination attempts (two politicians are killed, Octavius C. Granady and Giuseppe Esposito).
* [[April 12]] – A bomb attack against Italian Fascist leader [[Benito Mussolini]] in Milan kills 17 bystanders.
* [[April 13]] – The [[West Plains, Missouri#West Plains Dance Hall explosion|West Plains, Missouri Dance Hall explosion]] occurs.<ref>Not much is known about the West Plains Dance Hall explosion. Much of this event has been lost in time, and since [[forensic science]] was still developing, the cause was never discovered.</ref>
* [[April 12]] – [[April 14|14]] – The first east–west [[transatlantic flight]] by aeroplane takes place from [[Dublin]], Ireland, to [[Greenly Island, Canada]], using the German [[Junkers W 33]] ''[[Bremen (aircraft)|Bremen]]''.<ref>{{cite book|author=Robert Jackson|title=The Sky Their Frontier: The Story of the World's Pioneer Airlines and Routes, 1920–40|url=https://books.google.com/books?id=om9PAAAAMAAJ|year=1983|publisher=Airlife Pub. Limited|isbn=978-0-906393-28-4|pages=7–11}}</ref>
* [[April 14]] – An [[1928 Chirpan–Plovdiv earthquakes|earthquake occurs in Chirpan]], [[Bulgaria]], followed four days later by another in [[Plovdiv]]. Between them, they destroy more than 21,000 buildings, and kill almost 130 people.<ref>{{cite book|title=Annali di geofisica|url=https://books.google.com/books?id=OihQAQAAIAAJ|year=2001|publisher=Istituto nazionale di geofisica|page=546}}</ref>
* [[April 19]] – Publication of the original ''[[Oxford English Dictionary]]'' is completed after 70 years with issue of the last section ("wise – wyze") in [[Oxford]].<ref>''OED'' (1933, 1978 vol. 1, pp. xxv, xxvl).</ref>
* [[April 22]] – An [[List of earthquakes in Greece|Ms 6.0 earthquake]] affects southern Greece with a maximum Mercalli intensity of IX (''Violent''), leaving 20 dead, and destroying 3,000 homes in [[Corinth]]; a non-destructive tsunami is also observed.<ref>{{citation|title=Search result: Country=Greece|url=https://www.ngdc.noaa.gov/hazel/view/hazards/earthquake/event-data?country=GREECE|author=NGDC|publisher=[[National Geophysical Data Center]], [[National Oceanic and Atmospheric Administration|NOAA]]|doi=10.7289/V5TD9V7K|year=1972|type=Data Set}}</ref>
* [[April 28]] – 28&nbsp;inches of snow fall in southern-central Pennsylvania, United States.<ref>{{cite web|first1=Gina|last1=Cherundolo|first2=Carly|last2=Porter|title=Is Winter Finally Over?|url=http://www.accuweather.com/blogs/news/story/26025/is-winter-finally-over.asp|work=AccuWeather.com|date=2010-03-11|access-date=2012-01-30}}</ref>