“The Visegrad countries know better than most that security, whether military, economic, human or otherwise, can never be taken for granted,” said U.S. Ambassador Colleen Bell in her opening remarks at the roundtable discussion “Security Cooperation in the Visegrad Group – Regional Challenges and Initiatives,” co-hosted by the U.S. Embassy and CEU’s Center for EU Enlargement Studies (CENS) on April 23. The Visegrad group, known as V4, is made up of Hungary, the Czech Republic, Slovakia and Poland.