Since August 31, the anniversary of Germany’s invasion into Poland, Alwyn Collinson has been tweeting the events of World War II as if they were in real time, 72 years later. Under the handle @RealTimeWWII, Collinson sends up to 40 tweets a day chronicling the war, using eyewitness accounts, photographs and video. His Twitter page now has more than 118,000 followers and his tweets are translated into Spanish, Portuguese and Russian. Collinson talks about how he embarked on the six-year project.