The positron which is the antiparticle of the electron is first discovered by Carl Anderson.

The British win the Battle of the Nile.

Albert Einstein and Leó Szilárd write to Franklin D. Roosevelt, urging him to develop a nuclear weapon.

A bomb explodes and kills 85 people at the railway station in Bologna, Italy.

Albert Einstein and Leó Szilárd wrote a letter to Franklin D. Roosevelt, urging him to develop a nuclear weapon.

A massacre is carried out in Valvettitura by an c in Sri Lanka that killed 64 ethnic Tamil civilians.