Deaths on April 9

Alexander Dalgarno, English physicist and academic (b. 1928)

Alexander Dalgarno FRS (5 January 1928 – 9 April 2015) was a British physicist who was a Phillips Professor of Astronomy at Harvard University.

29 Apr

2015 Baltimore protests
A baseball game between the Baltimore Orioles and the Chicago White Sox sets the all-time low attendance mark for Major League Baseball. Zero fans were in attendance for the game, as the stadium was officially closed to the public due to the 2015 Baltimore protests.
3 May

Charlie Hebdo shooting
Two gunmen launch an attempted attack on an anti-Islam event in Garland, Texas, which was held in response to the Charlie Hebdo shooting.
14 Jul

New Horizons
NASA's New Horizons probe performs the first flyby of Pluto, and thus completes the initial survey of the Solar System.
20 Jul

Cuba-United States relations
The United States and Cuba resume full diplomatic relations after five decades.
14 Aug

Cuba-United States relations
The US Embassy in Havana, Cuba re-opens after 54 years of being closed when Cuba-United States relations were broken off.