agreement, a loophole in that treaty is incentivizing migrants coming from the u.s. to use roxham road. the way to close the road is to renegotiate the safe road agreement with the united states. reporter: an increased number of migrants from mexico are making the perilous journey south. the u.s. border patrol showing these images showing groups with infants and children in the subzero temperatures. they ll often fly to canada and take their chances walking through frigid woods and farms. an additional 25 agents sent to the nearby border patrol sector to deal with the increased southbound flow of migrants. though the numbers we re seeing on the northern border pale in comparison to the border some 2,000 miles from here. what you saw is a reminder of the politics and most importantly the people at play. jake. polo sandoval, thank you so