1 August 1962
An assassination attempt was made on first Ghana President, Kwame Nkrumah. The bomb, intended to eliminate Nkrumah, exploded and killed four people, scores of whom were left injured. Four years before this incident, Nkrumah passed the Preventative Detention Act which he used to imprison more than 1 000 of his political and social opponents. This was not the first attempt to kill Nkrumah, who had led Ghana to independence in 1957.
References

Boddy-Evans, A. ‘This Day in African History: 01 July’, from About African History, [online], available at www.africanhistory.about.com (Accessed: 22 July 2013)|South Africa History Online, ‘Assassination attempt on Kwame Nkrumah, first prime and later president of Ghana’, [online], available at www.sahistory.org.za (Accessed: 22 July 2013)