May 31 in history: Big Ben strikes first hour, Holocaust architect hanged and more

From first electric locomotive to the wildest tornado, here's a look at the major happenings from the history.

1859

Big Ben strikes first hour

(Photograph:WION)

1879

World's first electric locomotive

(Photograph:WION)

1961

South Africa becomes a republic

(Photograph:WION)

1962

Architect of Holocaust hanged

(Photograph:WION)

2013

Wildest tornado hits Oklahoma

(Photograph:WION)