Can I pull you folks apart for a minute?
It's WAY too early, to be talking about "vengeance" and "justice". Let's wait, at least, until someone gets arraigned. In the meantime, there are three families mourning their dead and dozens of people with serious injuries to deal with, some of which they will bear for the rest of their lives.
I think the following would be nice things to know right now:
1. Who are the suspects? What do they look and sound like? Are some of them still on the loose? Where?
2. Why did they do this? This was not a "crazy" attack. It was coordinated and well-planned, and probably involved outside accomplices. It was designed, until we find out otherwise, to make a statement. Like 9/11, it had a lot of symbolism: An attack where the US War of Independence began, on Patriot day. Like 9/11, it attacked a symbol of our strength, namely, the young and strong runners in the race.
It may have been coordinated with the other Al Qaeda-suspect attacks that immediately followed it in Kirkuk, Eilat and Bangalore. It may be a show of strength by Al Qaeda, after the loss of bin Laden, their "payback". I don't know exactly why they did it; but it seems to have taken months of preparation, so the reason lies back before then. Revenge for bin Laden would be a good guess.
Meanwhile, please note the following:
China reacts to student's death at Boston Marathon
Ben Carlson and Allison JacksonApril 16, 2013 21:34
"...It was perhaps this sense of connection between the countries that led many Chinese to express sympathy after the Boston blasts, even before the victim's Chinese nationality was revealed. This stands in marked contrast to the ambivalent, if not gloating, response in China after the 9/11 attacks.
"Author Zuojiacaojunshi expressed it well:
"'When 9-11 occurred, many Chinese hailed at it,' he wrote on Weibo, as translated by China Daily.
"'But after the Boston blasts yesterday, barely cheers but condolences, denouncement, and concern were spread on the Internet. With the development of the Internet in the past 11 years, especially the popularization of Weibo, many Chinese have changed their thinking and world outlook'..."
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China reacts to student's death at Boston Marathon | GlobalPost
That's GOOD news in all this. My daughter was in China, teaching English, during the 9/11 attack. When the students saw the plane crashing into the building, they all cheered. Then they saw their teacher in tears, and realized that there were human beings in those buildings. That was good. This time around, most Chinese didn't cheer, but felt compassion.