The challenges with facilitating legal border crossings can include many different things. From a legal and political stand point there are many issues. Legally agents working the borders have to ensure when searching that they do this in a reasonable manner so that they do not fringe on civil liberties. The agencies on the border also will not be able to search absolutely everything. There is so much import and export of goods and the arrival and departure of people happening that it would be impossible to search everything as to cause hold ups for hours and possibly ruin some of the goods. This could also aggravate people into unrest and cause major disturbances. Politically the challenges can be from not allowing or allowing only certain
