In the book/movie, "The Sand Pebbles", set in the 1920s, a Navy officer likens the US to 'an unbreakable cable'. I wonder what he'd think if he could see us today? He'd worry about the corroded condition, the many snapped and frayed strands which represent our present-day fifth-columnists who openly demand shariia, or those want socialism here and surrender abroad, or who advocate open borders, a North American Union, or immorality as 'freedom'.
I like Iscurrier's idea of grassroots homeland security; it seems like what the Founding Fathers had in mind in writing the Second Amendment.