JACKSONVILLE, Fla. -- Images show the scene just moments after the bombs exploded in Boston on Monday. There are now hundreds of photographs and video recordings captured by people in the city. Those images are difficult to watch, but investigators say they will actually help them.
Local experts say the fact that the Boston Marathon is a well-documented event will work to investigators' benefit. They already have video evidence they're sifting though. Experts tell Action News it's likely those who set them off are caught on camera somewhere.
"The whole purpose of terrorism is not necessarily to kill. It's to strike fear in the hearts of people," said former member of the bomb squad, Wyllie Hodges.
Monday, mid-afternoon, as runners celebrated crossing the finish line at the Boston Marathon, that's exactly what happened. Cheers turned to screams.
"It is an ideal format for a terrorist-type event," said former FBI agent Dale Carson.
Local experts say security is tight at the race. Officers are everywhere. And public safety has been heightened since 9/11. But Hodges tells Action News it wouldn't be hard for those responsible to go unnoticed.
"A bomb is not that difficult to build, especially one of the magnitude that I saw in the pictures," he said.
Carson says multiple explosions, seconds apart, prove it was planned out -- but it didn't take an expert to pull it off.
"The fact that the two bombs went off within 10 seconds of each other seems to indicate some degree of organization. But the low technology that was used for the explosive probably reflects that they're not very sophisticated," said Carson.
He says that tends to rule out groups like the Taliban. Carson says these images have now turned into critical pieces of evidence. Investigators are already working to figure out what type of bombs these were, who built them and who ultimately set them off.
"We'll find out who did this, whether they claim it or not," said Carson.
In the meantime, Hodges says it's critical America doesn't hide and this doesn't change the way we live day to day.
"You can't let fear change your life. If fear changes your life, terrorism won," he said.
Carson says it's also helpful one of the bombs didn't detonate. Investigators will be able to study that, possibly even take it apart, to figure out who built it.