1865 – US Civil war: Confederate President Jefferson Davis signs bill
authorizing use of slaves as soldiers
1922 – WRR-AM in Dallas TX begins radio transmissions
1924 – German Republic day
1930 – Clyde Tombaugh announces discovery of Pluto at Lowell
Observatory
1943 – Failed assassin attempt on Hitlerduring Smolensk-
Rastenburg flight
1963 –  Russian reconnaissance flights over Alaska
1969 – Apollo 9 returns to Earth
1986 – Soyuz T-15 carries 2 cosmonauts to Soviet space station Mir
1989 – 27th shuttle, Discovery 8, launched, 1st woman to do the
countdown
1989 – US space shuttle STS-29 launched