| 1 | Navigation lights glow in the background on the Panama Canal. | |
| 2 | Ships too big to go through the Panama canal would save even more. | |
| 3 | Houston is the closest U.S. port to the Panama Canal. | |
| 4 | About 4 percent of world trade now passes through the canal. | |
| 5 | Through the Panama Canal it is linked with Atlantic ports of Americas and Europe. |