It was first reported that a total of 93 people were killed from the terrorist shooting at the Youth Camp of the Labour Party on Utoya Island and in the bombing in Oslo. The number was later reduced to a total of 73 people, majority being from the Youth Camp shooting.
The Davidka Square bus bombing was a suicide bombing on June 11, 2003, on Egged bus line 14a in the center of Jerusalem, Israel. 17 people were killed in the attack and over 100 people were injured. Hamas claimed responsibility for the attack.
The bombing of Hiroshima resulted in between 90'000 and 166'000 fatalies. The bombing of Nagasaki resulted in between 60'000 and 80'000 fatalities. As a result, there were between 150'000 and 246'000 fatalities in total.
At the time people saw the bombing as a most do. Years after the war, came the people with nothing else to do, but to critique the nation. These people argued about the bomb effects and the fact that those bombs killed a high rate of civilian casualties.
It is not unlikely that the estimates of killed and wounded in Hiroshima (150,000) and Nagasaki (75,000) are over conservative. We will never know the real toll. Hiroshima had the highest toll because it was plain terrain.
Sorry- no way to answer- it would be difficult to determine exactly when and where the "First" bombing of WW 2 took place. Bombing had been used as a weapon against military personnel long before strategic bombing of cities took place.