no
There were no recorded assassination attempts made against President Van Buren.
Benjamin Harrison was a Brigadier General in the American Civil War.
No. The US was not in any wars while Harrison was President.
Yes, Grover Cleveland had two assassination attempts during his presidency. The first attempt occurred in 1885 when a man named George W. Wallace fired two shots at Cleveland but missed. The second attempt happened in 1893 when an unemployed carpenter named Patrick Eugene Prendergast shot and killed Chicago Mayor Carter Henry Harrison instead of Cleveland.
No. In fact there have not been any serious assassination attempts to my knowledge.
No. President Obama has not experienced any near assassination attempts.
No one is sure exactly how many assassination attempts were against the Prophet Mohummad pbuh; we only know there were many. His biggest act of forgiveness and kindness was that he refused to have any of his potential assassinators put to death.
Benjamin harrison
Yes. William Henry Harrison's grandson, Benjamin Harrison was also a US president.
Yes, in fact, any assassination at all is justifiable, even if there is no motive or cause. I encourage to move forward with your plan and take action. I wish you good luck in your assassination attempts.
Whether Benjamin Harrison was a hero will depend on your definitio of "hero." He had an excellent record as an officer in the Civil War. He was promoted to brigadier general because of his outstanding service. He was not wounded or and did not win any medals.
The queen was shot at three times (perhaps more) between 1840 and 1842, but was not injured in any of the assassination attempts.