solved what is the greatest threat to U.S. border security and

what is the greatest threat to U.S. border security and why?
Course Syllabus: Border security is a crucial part of our country’s homeland security efforts; however, many do not realize its complexity.  Securing the nation’s borders is a multifaceted and complex task comprised of often seemingly competing objectives that cross over multiple homeland security domains, as well as jurisdictions.  This course examines the United States’ approach to securing its borders within the larger context of homeland security. Students will analyze our nation’s border security strategies, policies, agencies, coordinating structures, and the associated legal and jurisdictional authorities through which border security is effectuated. Students will also assess the various internal and external threats and hindrances to securing America’s borders that still persist.