The complementarity principle of quantum physics was introduced by Niels Bohr at the International Congress of Physics in the Italian city of Como, where Bohr delivered his paper The Quantum Postulate and the Recent Development of Atomic Theory [REF].
Born: Peter Falk, American actor best known for portraying the detective Lieutenant Colombo in the TV series Columbo (d.2011); and Sadako Ogata, United Nations High Commissioner for Refugees from 1991 to 2001, in Tokyo .