ACLU highlights 'Constitution-Free Zone' 100 miles from border

This past summer, Craig Johnson joined dozens of other activists in a San Diego-area park to protest the expansion of a fence along the US-Mexico border.

An associate professor at Point Loma Nazarene University, Johnson says he took his two children, aged 8 and 10, to Border Field State Park in Imperial Beach in June. Scores of border patrol agents were on the scene, Johnson said, and some were recording license plate numbers from protesters' cars parked a more than a mile away from the border.

It seems that Johnson's participation in the anti-fence demonstration may have landed him on a government watch list that has inhibited his ability to travel freely between the US and Mexico. A professor of Music, Johnson said he traveled to Tijuana about a week after the protest; upon returning to the US, Johnson says he was handcuffed and arrested by customs agents after a listing associated with his name pegged him as armed and dangerous.

"I was thoroughly and aggressively searched. ... Every inch and crack and crevice of my body was poked and prodded," Johnson said. "I was in complete bewilderment of what was going on; I felt violated and frankly was embarrassed."