1928 -- Norwegian explorer Roald Amundsen was lost in flight over the Arctic Ocean.

1935 -- Germany signed a treaty with Britain limiting the size of the German fleet to 35 percent of that of the Royal Navy.

1953 -- Egypt was proclaimed a republic with General Neguib as its first president.

1964 -- The first trans-Pacific telephone service using the transoceanic cable began as U.S President Lyndon Johnson in Washington spoke to Japanese premier Hayato Ikeda in Tokyo.

1975 -- Prince Faisal Musaid was publicly beheaded in Riyadh for the assassination of Saudi King Faisal on March 25.

1979 -- U.S. President Jimmy Carter and Soviet President Leonid Brezhnev signed the second Strategic Arms Limitation Treaty (SALT 2) in Vienna.

1982 -- The Italian Roberto Calvi, a central figure in the Banco Ambrosiano scandal that was rocking his country, was found hanging under Blackfriars Bridge in London.

1983 -- Sally Ride became the first American woman to fly in space, aboard the shuttle Challenger.

1997 -- Turkish Prime Minister Necmettin Erbakan resigned, bringing to a close a tempestuous one-year tenure as the modern republic's first Islamist leader.

1999 -- The Group of Seven leading industrial countries at a summit in Cologne agreed an initiative to forgive $70 billion in debts owed by poor countries.

2000 -- Ethiopia and Eritrea sign a peace plan brokered by the Organization of African Unity to end their two-year border war.

2003 -- Finnish Prime Minister Anneli Jaatteenmaki resigned after she used leaked secret state information on Iraq during the March 2003 parliamentary elections.

2004 -- Leaders of the 25-nation EU bloc adopted an historic first constitution for a united Europe but many countries faced popular votes to secure its ratification.