tijuana mexico u.s. president donald trump wall far build tower concrete steel prototypes san diego make mexicans live south border feel campaign pledge turn pariahs eight sample high 30 feet meter complete last week near otay mesa border cross first tangible sign trump vow build wall california texas 21.6 billion opposite san diego residents mexican city tijuana home company park abut corrugate steel fence border dread prospect work permanent wall people still go cross necessity even though view us pariahs say student paola gomez 21 stand outside home noise workers put section drift across border look things like wall view us pariahs bad thing build latinos trump pledge frequently presidential campaign build wall help tackle illegal immigration crime unite state launch bid june 2015 accuse mexicans send rapists drug-runners unite state comment cause widespread outrage south border tijuana locals say hear spanish-speaking workers help build prototypes drive home irony latino labor use deter immigration latin america need mexicans undocumented people save lot money us say manuela altamirano 42 watch home strip wall go trump constantly things humiliate mexican people ... wall like monsters create like border frankenstein around 20 protesters gather mexican side last weekend set trump-style pinata fire wave sign read wall enemies say organizer sergio tamay migrant shelter angels without border even plan never move forward homeland security-funded prototypes likely remain place border patrol use help demonstrate agency operate officials san diego border patrol say may serve design replacements age section 654-mile 1,052 km fence already extend along almost 2,000-mile border late month test due begin prototypes determine easily immigrants could climb dig methods enter unite state illegally prove successful past stand around 40 meter 130 feet mexican border concrete rectangles create depress landscape say tijuana resident alexis franco 22 watch construction since begin late september go nuisance us live franco say outside dirt-floor home speak noise heavy machinery side border machine constant movement workers include speak spanish add guadalupe garcia 38 live unpaved street nearby say felt powerless protest even though construction din often wake frighten baby unfortunately anything say another country affect us mexicans dismay rise trump 's border wall