The San Ysidro Border Crossing, The Busiest In The World

The San Ysidro border crossing. (Photo: Rebekah Sager)

A road sign approaching the San Ysidro border crossing. (Photo: Rebekah Sager)

The San Ysidro border crossing. Andrew Tahmooressi was caught in the wrong lane to make a U-turn and was blocked by the concrete dividers from getting to the correct one. (Photo: Rebekah Sager)

Andrew Tahmooressi's weapons and ammunition were confiscated by Mexican police. (Photo: Rebekah Sager)