Will we ever learn the full truth about the Boston Marathon bombing? Personally, I have been looking into this attack for days, and I just keep coming up with more questions than answers. At this point, I honestly have no idea what really happened. Why was a bomb drill being held on the day of the attack? Why have authorities denied that a bomb drill was taking place? Were Tamerlan and Dzhokhar Tsarnaev acting alone? What was the nature of their previous contacts with the FBI and other federal agencies?