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WASHINGTON (WUSA9) -- There are likely to be hundreds, maybe even thousands of victims, hurt physically and emotionally, after the Boston Marathon explosions on Monday.

Mai Fernandez, from the National Center for Victims of Crime, says shock is the first reaction for victims in a mass incident like the one in Boston.

After a crime like this one, people tend to close up and internalize their problems, leading to mental anguish, Fernandez said.

"It's like a smoke-filled room and you need to open it and ventilate it," Fernandez explained. She says that the mental pain can be just as traumatic as the physical pain.

Mass attacks like these also take a toll on the whole community. In the past year, the U.S. has suffered three large attacks: The Aurora theater shooting, the Sandy Hook Elementary School shootings, and now the Boston Marathon Blasts. Fernandez says it's up to the whole community to heal together.

"You have a community that has been victimized, so now it's time for people to come together," Fernandez said.