Ok. I give up.
I place all five satchels under the bridge and sprint to the nearest arms cache. I wait for the flash command and use my middle mouse wheel. There is no command to blow up the five satchels no matter how far my player is from the bridge. I can be standing under the bridge or at the arms cache or across the river. No option to blow the bridge using my middle mouse wheel.
If I pick up a satchel from the arms cache and place it somewhere, I have the options of deactivating it, setting a timer or setting it off. I do not get these options with the five that I start the mission with.
What am i doing wrong or missiong?
Thanks for everyone's input.
S