Originally posted by the Voice of America. Voice of America content is produced by the Voice of America, a United States federal government-sponsored entity, and is in the public domain. 450 Miles of Border Wall by Next Year? In Arizona, it Begins Associated Press YUMA, ARIZONA - On a dirt road past rows of date trees, just feet from a dry section of Colorado River, a small construction crew is putting up a towering border wall that the government hopes will reduce -- for good -- the flow of immigrants who cross the U.S.-Mexico border illegally. Cicadas buzz and heavy equipment rumbles and beeps before it lowers 30-foot-tall (9-kilometer-tall) sections of fence into the dirt. "Ahi esta!" -- "There it is!" -- a Spanish-speaking member of the crew says as the men straighten the sections into the ground. Nearby, workers pull dates from palm trees, not far from the cotton fields that cars pass on the drive to the border. South of Yuma, Arizona, the tall brown bollards rising against a cloudless desert sky will replace much shorter barriers that are meant to keep out cars, but not people. .