Today is Saturday, April 28, the 119th day of 2012. There are 247 days left in the year.

1686 ― First volume of Isaac Newton's ``Principia" published

1770 ― Captain James Cook in Endeavor lands at Botany Bay in Australia

1914 ― W. H. Carrier patents air conditioner

1932 ― Yellow fever vaccine for humans announced

1935 ― Moscow underground opens (81-km long)

1956 ― Last French troop leave Vietnam

1967 ― Muhammad Ali refuses induction into army and stripped of boxing title

1989 ― Argentina, hit by rocketing inflation, runs out of money

1994 ― First multiracial election in South Africa ends (three days)

1995 ― Gas explosion in South Korean subway construction site, 103 die