The sense of shock after Monday's explosions has given way in Boston to confusion.
People are hoping against hope that the bomber is caught soon but they are bewildered by the leaks and changing stories emerging from the FBI.
Correspondent Robert Moore's report, contains distressing images:
New photos of the suspects identified by officials as Dzhokar A. Tsarnaev, 19 and Tamerlan Tsarnaev, 26 have been released.
The FBI has released pictures and video of two suspects in the Boston Marathon bombing, seeking the public's help.
President Obama attended a memorial service in Boston today, paying tribute to the victims of Monday's terrorist attack.