A possible suspect has been identified in the Boston Marathon bombing.
Lord & Taylor is located on Boylston Street in downtown Boston. It was there, across the street, that the second bomb went off.
A bag next to a mailbox is believed to have contained the second bomb. A photo was taken moments after the blast shows the bag is gone.
The breakthrough comes as the FBI revealed that the bombs that caused so much suffering and chaos were made from a pressure cooker.
INSIDE EDITION has learned the high-end pressure cooker is made by Fagor, a cookware company based in Spain. It sells for $139.
Pressure cookers can also be dangerous if mishandled, as a video of an accident shows.
INSIDE EDITION’s Megan Alexander spoke to former FBI counter terrorism expert Don Borelli, now Senior Vice President of the Soufan Group.
Alexander asked, “How difficult is it to make a bomb from a pressure cooker?”
Borelli said, “It's relatively easy. Instructions are all over the internet. It tells you everything you need. The average person could probably do it.”
Pressure cooker bombs are frequently used in Iraq and Afghanistan.
Video of the explosions show large pieces of debris, including pieces of the pressure cooker, that rained down after the blast.
Photos have just been released by the FBI showing the mangled remnants they found.
Borelli said, "A whole lid in tact like this was found on the roof of a building. This could be very significant."
Police combing the scene of the bombing inch by inch found other clues too, including a rechargeable battery sold under the brand name Tenergy. The battery is specifically designed for remote controls.The FBI released a photo of the remains of a circuit board that may have been used to detonate the bomb. Another photo shows what's left of a black nylon duffel bag that contained one of the bombs.
Police say the bomb was packed with nails, ball bearings and bb ammo, designed to cause horrific injuries.
The recipe for the bomb may have come from an Al-Qaeda magazine, Inspire. One article is called "How to Make a Bomb in the Kitchen of Your Mom."