Thousands of people cross the Texas border each day to go to school in the United States, according to the BBC News website.

There are thousands of students who have Mexican passports with U.S. student visas to cross the border between El Paso and Ciudad Juarez to attend school.

U.S. officials say around 4.2 million people have used the three bridges that link the two cities making it the second-busiest port of entry into the country by passenger volume. Many other people cross the border work on the other side or to buy groceries.

"El Paso and Ciudad Juarez form the largest true bi-national community in the world, or at least any place we have been able to determine," El Paso Congressman Beto O'Rourke said.

"There are three million people sharing the same water source, the same airshed, the same mountains, the same valley in which we live."

Juarez is one of the most dangerous cities in the world, but El Paso is one of the safest big cities in America.

"It's safer here than over there in Juarez," said Febe Ara, a 16-year-old who crosses the border to go to school each day.

"There are many problems over there and many deaths, but not here," she added. "There are more policemen patrolling the streets."

Border security has become a hot topic in the U.S. after thousands of unaccompanied minors migrated to America at the south-western border near McAllen, Texas.

President Barack Obama said he would provide more resources in order to make the border more secure and prevent another surge of undocumented immigrants.

In a recent meeting with Mexican President Enrique Pena Nieto at the White House, Obama said he would be "more aggressive at the border in ensuring that people come through the system legally."

El Paso Congressman O'Rourke said the border is safer than at any time in the country's history.