I too would like to expree my heartfelt condolences, however there are alawys two sides to coin. After sixty years America has seen bloodshed of this type on its soil but we in witness it daily in Kashmir. With all due respect to all those who died it should be brought to notice that we have casualties of the same number much often. Since ages now India has been asknig America to help figt terrorism probably now they will understand why.
Morover Americas dadagiri is also a factor to consider here. After all how long do you think you can keep the guys in the middle east will put up with it.
Anyway what has happened is a sure sign of cowardliness, but that is characteristic those Middle Eastern terrorists.