[dawn53]

I don’t know how you heighten bridge security. There are so many bridges with such heavy traffic it seems an impossible task.

[budwiesest]

I don’t know how you heighten bridge security.

Correct, you just put more 'badges' around them (which will indicate the level of threat), scare off the bad-guys and hand out free cans of Rustoleum.

[PennsylvaniaMom]

There are so many bridges, that in many cases you don't even realize that you are driving over a bridge deck (not all span water). My commute is less than 20 minutes, and due to topography (no water) I across 6 spans.

Prayers for those in Minneapolis.

[justa-hairyape]

There are so many bridges with such heavy traffic it seems an impossible task.

We all should hope that this is not terrorism related, but if it is, that cell or cells needs to be found quick. Especially if they are good at bringing down bridges with small charges.