down from about 40, 50, to 15 or 20. this is an area we don't see that much traffic anymore because the smugglers know. >> are there certain times of day you see more trying to get across? >> they're opportunists, so whenever they feel that the opportunity is there for them to run their narcotics or illegal aliens, they'll do it. >> you are watching them, but they're also watching you. >> this is something else that's been very effective for the border patrol to stop illegal migration and narcotics trafficking. this is leftover bits of border wall. so far no one has treated to lo -- tried their luck at it. >> you can get an in depth look at the entire length of the u.s.-mexico border at cnn.com. john moore's photographs say the many different ways the border is marked along some 3,200 kilometers or almost 2,000 miles. violence and protests are making life difficult for haiti's hospitals, and they already have plenty of challenges to deal with. that is next. plus, the looming showdown over