On foot, by bus, on the back of juddering trucks, like tens of thousands of others they slogged for days along the Pan-American highway through Colombia and Ecuador. Grubby and sleepless, their goal was to reach Peru, a sanctuary of sorts for a desperate Venezuelan family. Exhausted and sleepless from the endless wash of traffic noise on the highway’s shoulder, the Mendoza Landinez family had the additional pressure of a deadline: to enter Peru before new rules required them to produce a passport