The free exhibit by the international medical humanitarian group displayed on Independence Mall runs until Nov. 13. It runs from 9 a.m. until 3:30 each day.

This is both a normal security protocol and a worrying sign for the future of a free Europe. France is part of the Schengen Area, a collective of 26 countries that enjoy free travel at joint borders.

dkalo/Flickr In a July 2007 piece, " Open Markets, Closed Borders," Kerry Howley explored dissonance among Republicans who support the free movement of goods, but not people, between nations: ...

Checks on documents at borders are being reintroduced by France, the Netherlands and Belgium, which is demanding that Tunisians arriving on Italian temporary permits show they have at least 10,000 ...

Patti Tamara Lenard, Culture, Free Movement, and Open Borders, The Review of Politics, Vol. 72, No. 4 (FALL 2010), pp. 627-652 ...

All people should be free to move about the earth, uncaged by the arbitrary lines known as borders. Not every place in the world is equally well-suited to mass economic activity.

The answer is probably that free movement will remain for citizens of the EU but that there will have to be a much tighter enforcement for anyone who falls outside of that definition.