If you look at the two links I gave to Cleveland area news media you will see that the FBI confidential informant actually played a big role in planning and carrying out this attack on the bridge. Dummy explosives were planted.

Law enforcement was going for a big score. Hope they did not go too far and entrap these people in some scheme that would not have happened unless the CI pushed it. Lawyer questions informant's role in Brecksville Route 82 bridge bomb plot Bridge bomb plot: 5 suspects arrested, charged with failed attempt to blow up the Ohio 82 bridge (video) | cleveland.com