Some survivors experienced so-called "survivor's guilt", believing that they could have given more help.

For now, nearly all the survivors are experiencing some level of acute stress that could last for weeks or months, experts said.

"A survivor can feel displaced, confused, numb, angry, guilty, sad or a combination, and can experience physical changes as part of a normal grief response."

While survivors have experienced significant trauma, they are often able to thrive with the proper support.

After telling the Others that they must bury the bomb, the survivors experience another time jump.

If a traumatic event was life-threatening, but did not result in death, then it is more likely that the survivor will experience post-traumatic stress symptoms.

One listener wrote, that these survivors had just experienced some very significant life threatening incidents and that he had treated them with outstanding empathy.

Tom Brokaw reports on how survivors and victims' families experienced 9/11.

Many survivors experience one or all these symptoms in the days after the traumatic event.

It has been suggested that the survivors experienced a type of spiritual crisis because their medical and religious leaders could not prevent the epidemic.