5 de abril

Robert Serber’s lectures opened the new laboratory: “The object of the project is to produce a practical military weapon in the form of a bomb in which the energy is released by a fast neutron chain reaction.” Edward Condon’s notes of them became the Primer.

Interior Minister Czesław Kiszczak and Lech Wałęsa, the electrician from the Gdańsk shipyard, faced each other across a purpose-built round table. After two months they agreed semi-free elections: 35 per cent of the Sejm’s seats open to a real contest and a new Senate freely elected. Solidarity…

The survey settled where the Indian Ocean is deepest, a point earlier charts had put elsewhere, and Vescovo was the first person there.