Prototypes for Trump's U.S.-Mexico border wall

Yahoo News Photo Staff

President Trump defended his plan for a wall along the U.S. southern border on Thursday after White House Chief of Staff John Kelly said some of the immigration policies Trump touted during the campaign — including the wall — had “changed.”

“The Wall is the Wall, it has never changed or evolved from the first day I conceived of it,” the president tweeted. “Parts will be, of necessity, see through and it was never intended to be built in areas where there is natural protection such as mountains, wastelands or tough rivers or water.”

Here’s a look at eight prototypes constructed in Otay Mesa in San Diego, Calif., by six contractors competing to build Trump’s ”Big Beautiful Wall.”

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<p>This combination of pictures shows the eight prototypes of US President Donald Trump’s US-Mexico border wall being built near San Diego, in the US, seen from across the border from Tijuana, Mexico, on Oct. 22, 2017. (Photo: Guillermo Arias/AFP/Getty Images) </p>
Prototypes for Trump’s U.S.-Mexico border wall

This combination of pictures shows the eight prototypes of US President Donald Trump’s US-Mexico border wall being built near San Diego, in the US, seen from across the border from Tijuana, Mexico, on Oct. 22, 2017. (Photo: Guillermo Arias/AFP/Getty Images)

<p>Prototype U.S.-Mexico border walls stand in this aerial photograph taken over San Diego, Calif., on Monday, Oct. 30, 2017. (Photo: Daniel Acker/Bloomberg via Getty Images) </p>
Prototypes for Trump’s U.S.-Mexico border wall

Prototype U.S.-Mexico border walls stand in this aerial photograph taken over San Diego, Calif., on Monday, Oct. 30, 2017. (Photo: Daniel Acker/Bloomberg via Getty Images)

<p>A U.S. Border Patrol agent sits on a horse in front of a U.S.-Mexico border wall prototype while patrolling in San Diego, Calif., on Monday, Oct. 30, 2017. (Photo: Daniel Acker/Bloomberg via Getty Images </p>
Prototypes for Trump’s U.S.-Mexico border wall

A U.S. Border Patrol agent sits on a horse in front of a U.S.-Mexico border wall prototype while patrolling in San Diego, Calif., on Monday, Oct. 30, 2017. (Photo: Daniel Acker/Bloomberg via Getty Images

<p>People pass border wall prototypes as they stand near the border with Tijuana, Mexico, Thursday, Oct. 19, 2017, in San Diego, Calif. (Photo: Gregory Bull/AP) </p>
Prototypes for Trump’s U.S.-Mexico border wall

People pass border wall prototypes as they stand near the border with Tijuana, Mexico, Thursday, Oct. 19, 2017, in San Diego, Calif. (Photo: Gregory Bull/AP)

<p>A Federal Protective Services Police unit sits on the edge of the shadow of the KWR Construction company prototype entry in the ”other than concrete” category, which is made of steel and features a see through bottom in San Diego Calif., on Oct. 25, 2017. The six contractors constructing eight prototype border wall sections on Otay Mesa have finished their entries in the competition to build President Trumps ”Big Beautiful Wall.” The entries will sit for 30 days for concrete to cure then be evaluated as to their effectiveness. (Photo: John Gibbins/San Diego Union-Tribune via ZUMA Wire) </p>
Prototypes for Trump’s U.S.-Mexico border wall

A Federal Protective Services Police unit sits on the edge of the shadow of the KWR Construction company prototype entry in the ”other than concrete” category, which is made of steel and features a see through bottom in San Diego Calif., on Oct. 25, 2017. The six contractors constructing eight prototype border wall sections on Otay Mesa have finished their entries in the competition to build President Trumps ”Big Beautiful Wall.” The entries will sit for 30 days for concrete to cure then be evaluated as to their effectiveness. (Photo: John Gibbins/San Diego Union-Tribune via ZUMA Wire)

<p>Six contractors constructed eight prototype border wall sections on Otay Mesa in the competition to build President Trump’s ”Big Beautiful Wall” in San Diego, Calif., on Oct. 26, 2017. (Photo: John Gibbins/TNS via ZUMA Wire) </p>
Prototypes for Trump’s U.S.-Mexico border wall

Six contractors constructed eight prototype border wall sections on Otay Mesa in the competition to build President Trump’s ”Big Beautiful Wall” in San Diego, Calif., on Oct. 26, 2017. (Photo: John Gibbins/TNS via ZUMA Wire)

<p>Federal agents stand watch over President Donald Trump’s eight border wall prototypes as they near completion along U.S.- Mexico border near San Diego, Calif., Oct. 23, 2017. (Photo: Mike Blake/Reuters) </p>
Prototypes for Trump’s U.S.-Mexico border wall

Federal agents stand watch over President Donald Trump’s eight border wall prototypes as they near completion along U.S.- Mexico border near San Diego, Calif., Oct. 23, 2017. (Photo: Mike Blake/Reuters)

<p>One of President Donald Trump’s eight border wall prototypes is pictured along U.S.- Mexico border near San Diego, Calif., Oct. 23, 2017. (Photo: Mike Blake/Reuters) </p>
Prototypes for Trump’s U.S.-Mexico border wall

One of President Donald Trump’s eight border wall prototypes is pictured along U.S.- Mexico border near San Diego, Calif., Oct. 23, 2017. (Photo: Mike Blake/Reuters)

<p>People look at prototypes of a border wall Thursday, Oct. 26, 2017, in San Diego. (Photo: Elliott Spagat/AP) </p>
Prototypes for Trump’s U.S.-Mexico border wall

People look at prototypes of a border wall Thursday, Oct. 26, 2017, in San Diego. (Photo: Elliott Spagat/AP)

<p>One of President Donald Trump’s eight border wall prototypes is pictured along U.S.- Mexico border near San Diego, Calif., Oct. 23, 2017. (Photo: Mike Blake/Reuters) </p>
Prototypes for Trump’s U.S.-Mexico border wall

One of President Donald Trump’s eight border wall prototypes is pictured along U.S.- Mexico border near San Diego, Calif., Oct. 23, 2017. (Photo: Mike Blake/Reuters)

<p>Mexican federal police officers (L) look over the current border fence, while U.S. border patrol authorities visit the site where several prototypes for U.S. President Donald Trump’s border wall with Mexico have been built, in this picture taken from the Mexican side of the border, in Tijuana, Mexico, Oct. 26, 2017. (Photo: Jorge Duenes/Reuters) </p>
Prototypes for Trump’s U.S.-Mexico border wall

Mexican federal police officers (L) look over the current border fence, while U.S. border patrol authorities visit the site where several prototypes for U.S. President Donald Trump’s border wall with Mexico have been built, in this picture taken from the Mexican side of the border, in Tijuana, Mexico, Oct. 26, 2017. (Photo: Jorge Duenes/Reuters)

<p>Picture of a prototype of US President Donald Trump’s US-Mexico border wall being built near San Diego, in the US, as seen from across the border from Tijuana, Mexico, on Oct. 5, 2017. (Photo: Guillermo Arias/AFP/Getty Images) </p>
Prototypes for Trump’s U.S.-Mexico border wall

Picture of a prototype of US President Donald Trump’s US-Mexico border wall being built near San Diego, in the US, as seen from across the border from Tijuana, Mexico, on Oct. 5, 2017. (Photo: Guillermo Arias/AFP/Getty Images)

<p>Prototypes (C) for President Donald Trump’s border wall with Mexico are shown near completion in this picture taken from the Mexican side of the border, in Tijuana, Mexico, Oct. 23, 2017. (Photo: Jorge Duenes/Reuters) </p>
Prototypes for Trump’s U.S.-Mexico border wall

Prototypes (C) for President Donald Trump’s border wall with Mexico are shown near completion in this picture taken from the Mexican side of the border, in Tijuana, Mexico, Oct. 23, 2017. (Photo: Jorge Duenes/Reuters)

<p>The top of one of President Donald Trump’s eight border wall prototypes is pictured along U.S.- Mexico border near San Diego, Calif., Oct. 23, 2017. (Photo: Mike Blake/Reuters) </p>
Prototypes for Trump’s U.S.-Mexico border wall

The top of one of President Donald Trump’s eight border wall prototypes is pictured along U.S.- Mexico border near San Diego, Calif., Oct. 23, 2017. (Photo: Mike Blake/Reuters)

<p>A woman walks past prototype sections of a border wall between Mexico and the United States under construction on October 5, 2017 in Tijuana, Mexico. (Photo: Sandy Huffaker/Getty Images) </p>
Prototypes for Trump’s U.S.-Mexico border wall

A woman walks past prototype sections of a border wall between Mexico and the United States under construction on October 5, 2017 in Tijuana, Mexico. (Photo: Sandy Huffaker/Getty Images)

<p>A handout photo made available by U.S. Customs and Border Protection shows border patrol agents watching the construction of prototypes of the proposed border wall between the U.S. and Mexico near Otay Mesa, Calif., Oct. 3, 2017. (Photo: U.S. Customs and Border Protection/EPA-EFE/REX/Shutterstock) </p>
Prototypes for Trump’s U.S.-Mexico border wall

A handout photo made available by U.S. Customs and Border Protection shows border patrol agents watching the construction of prototypes of the proposed border wall between the U.S. and Mexico near Otay Mesa, Calif., Oct. 3, 2017. (Photo: U.S. Customs and Border Protection/EPA-EFE/REX/Shutterstock)

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