A Connecticut state investigator examines the scene of a Metro-North train collision on Saturday, May 18, in Fairfield, Connecticut. Two commuter trains collided during rush hour on Friday, sending dozens to the hospitals and shutting down a busy section of track, which is expected to affect commuters for weeks to come. Michael Graae/Getty Images
Construction equipment is moved in to place. The wreckage will not be removed until investigators finish examining the site, which may be Sunday. Michael Graae/Getty Images
National Transportation Safety Board investigators examine the scene of the collision. Michael Graae/Getty Images
Investigators walk past two train cars damaged in the collision on Friday, May 17. David Allbritton/CNN
Onlookers gather at the scene on Friday, May 17. Michelle McLoughlin/reuters/landov
People are seen inside one of the two derailed trains on May 17. courtesy Kwangik Hong
Debris and twisted metal is seen inside one of the derailed trains on May 17. courtesy Kwangik Hong
Both trains were damaged and dozens were injured, though officials say the injuries aren't believed to be life-threatening. Michelle McLoughlin/reuters/landov
Onlookers gather as police cordon off the area. Michelle McLoughlin/reuters/landov
A woman injured in the crash is prepared to be transported to the hospital. Michelle McLoughlin/reuters/landov
Amtrak also announced early Friday night that it had suspended all travel between New York and Boston indefinitely after the crash. Michelle McLoughlin/reuters/landov
Passengers gather as they wait for a bus to pick them up from the scene of the collision. Michelle McLoughlin/reuters/landov