radar, and was headed back through the panama canal. u.s. officials are looking at the possibility that cuba was sending the equipment to north korea for an upgrade. >> it's going to take some time to confirm the details of this case, but that would be a violation of the security council resolution. >> reporter: all indications are u.s. intelligence tipped off the panamanians to the ship. the canal is a security nightmare for billions of dollars in shipping. 14,000 vessels transit every year. 60% of the cargo carried is either delivered to the u.s. or shipped from american ports. 755,000 barrels a day of crude oil and other fuels move through the canal. >> they unearthed this problem with the north koreans. so it's great. it really is a tribute to the panamanians. you have to have a very aggressive entry and exit procedure to make sure that what is going through -- what's passing through the canal is in