correspondent ann kellan reports from the colombian side of the border. well this is the t.n.t. to us bridge crossing behind me you can see this is where colombia and venezuela meet you can see the infamous shipping containers that we've seen in so many photos this is this far as anyone is allowed to go police are under strict orders to not allow anyone to pass into a colombian president iran dukie gives the order for these ten trucks carrying six hundred tons of so-called humanitarian aid to cross the bridge and attempt to enter venezuela and venezuela's borders the police are saying that duke a may allow protesters to cross with them as well some of these protesters have told us they're prepared for violence so this could escalate into a real clash the the aid is is prepared to be delivered if it multiple crossings this is the last one where the deliveries will start at the other bridge crossings protesters who have been pelting the venezuelan national guard with rocks venezuelan. president in caracas the venezuelan president nicolas maduro has called for his supporters to go