There are some confusing elements surrounding the Boston Marathon bombings. One is the existence of Abdulrahman Ali Alharbi. According to the source quoted above, this is possibly someone who is working for the American government. He is a Saudi national, which does not necessarily mean he is a citizen of Saudi Arabia. He was removed from the country as quickly as possible, so some people feel that heightens the possibility of Alharbi's being a government operative.
The 21stcenturywire site shows many pictures which suggest the presence of a number of backpack-wearing men with similar clothes, and their presence was noted before the bombing actually occurred. There is also a similarity between the Boston bombing and the 7/7 attack in London six years ago. On the occasion of both tragedies, a drill took place, a drill that unfortunately turned into reality. The presence of Craft International, a private military firm, is an example of a confusing element that has caused some people concern.
The American government has encouraged people not to ask too many questions because if people follow the clues of inaccurate or irrelevant photos, for example, that will consume too much administrative time for law enforcement and will distract them from finding the real killers. Although allegedly the Tsarnaev brothers, Tamerlan and Dzhokhar, are the responsible ones, such articles cast doubt on this assumption.