It could be a day picked by some nut at random, but because the bombs were positioned in a way and timed when the first marathoners came by, we have to consider that as a factor. But it is also our official income tax day for personal filers.
Also there is this:
Yom Hazikaron (officially known as Fallen Soldiers and Victims of Terrorism Remembrance Day) starts on Sunday night and continues to sundown Monday, when, in an intense and sudden change of mood, the whole country erupts into celebration of the 63rd anniversary of Israel’s Independence.
So it's way too early to speculate on motive. It is enough to be concerned that there may still more devices yet undetected and to be in solidarity with those in Boston.
Also there is this:
![528407_10151877162509698_617164436_n.jpg](https://sphotos-a.xx.fbcdn.net/hphotos-ash3/528407_10151877162509698_617164436_n.jpg)
So it's way too early to speculate on motive. It is enough to be concerned that there may still more devices yet undetected and to be in solidarity with those in Boston.