Protesters carry hand lettered signs as they march in Dallas, Texas.

Gustavo Bujando Reyes (center, with shirt and tie) of the Citizens Network group and one of the instigators of the protest march carried out on Saturday in Dallas, greets the thousands of Hispanics who gathered for this mobilization. (Jose L. Castillo)

Two men stand in front of protesters carrying sign and a Mexican flag. The demonstrators are marching against anti-immigration legislation.

Thousands of Hispanics united in protest on Saturday in front of the City Hall of Dallas against the anti-immigration measures which would endanger undocumented immigrants.

Marchers carry signs and a United States flag during a rally to protest anti-immigration legislation before the U. S. Congress.

A group of protesters carry signs and the flags of the United States and Mexico during an march to show rejection of anti-immigration legislation.

A group of protesters carry hand lettered signs on the corner of North Houston and Elm Streets in Dallas, Texas.

Signs are carried by marchers protesting anti-immigration legislation. Two of the signs read, "We Are Not Divided But United, No HR 4437" and "We Want Another Amnesty."

Protesters carry signs in front of Dallas City Hall. They are against the anti-immigration legislation being debated in the U. S. Congress.

Protesters carry signs outside Dallas City Hall during a demonstration against anti-immigration legislation being debated in the U. S. Congress.

A line of protesters carry signs in Spanish and English during a march against anti-immigration legislation.

Women hold placards at a protest at Dallas City Hall. Thousands participated in the protest on Saturday outside the City Hall and also there were dozens of banners and posters which asked for "Justice for the undocumented," "Equality of rights," or "No to the wall." But it was a single feeling which united the more than 2,000 persons protesting H.R. 4437 presented to Congress by Congressman James Sensenbrenner (R-WI).

Thousands of Hispanics united in protest on Saturday in front of the City Hall of Dallas against the anti-immigration measures which would endanger undocumented immigrants.

Protesters carry signs as the crowd is reflected in the windows behind them. They are demonstrating against anti-immigration legislation being debated before the U. S. Congress.

Protesters hold signs while the image of the crowd is reflected in the windows of Dallas City Hall. They are against anti-immigration legislation being debated in the U. S. Congress.

Protesters hold up signs in front of Dallas City Hall. One sign reads, "Immigrants Help Build America."

Men, women, and children gather to show rejection of anti-immigration legislation before the U. S. Senate. Two signs read, "Immigrants Help Build America," and "NO HR4437."

Protesters wearing white shirts carry signs during a march against anti-immigration legislation.

Marchers, carrying signs, march past a sign for the Dallas Museum of Art Sculpture Garden.

Immigration protesters waving signs (in English and Spanish) and American flags march past vendors and onlookers. According to the Dallas Police Department, at least 100,000 people marched in the most well-attended civil movement in the history of Dallas. The protesters demanded the legalization of Hispanic undocumented immigrants, estimated to be about twelve million in the United States. The so-called "mega march" was carried out to demand immigrant amnesty as members of the U.S. Congress debated immigration reform.

A camera man captures a Dallas Police officer providing crowd control at the April "Mega March" in downtown Dallas. According to the Dallas Police Department, at least 100,000 people marched in the most well-attended civil movement in the history of Dallas. The protesters demanded the legalization of Hispanic undocumented immigrants, estimated to be about twelve million in the United States. The so-called "mega march" was carried out to demand immigrant amnesty as members of the U.S. Congress debated immigration reform.

A large group of immigration protesters wave signs and American flags in Dallas. According to the Dallas Police Department, at least 100,000 people marched in the most well-attended civil movement in the history of Dallas. The protesters demanded the legalization of Hispanic undocumented immigrants, estimated to be about twelve million in the United States. The so-called "mega march" was carried out to demand immigrant amnesty as members of the U.S. Congress debated immigration reform.

Immigration protesters of varying ages wave signs and American flags outside the Cathedral Santuario de Guadalupe (Cathedral Shrine of Our Lady of Guadalupe) of Dallas. One young protester holds a sign that reads: "We are not terrorist (sic) We are workers." According to the Dallas Police Department, at least 100,000 people marched in the most well-attended civil movement in the history of Dallas. The protesters demanded the legalization of Hispanic undocumented immigrants, estimated to be about twelve million in the United States. The so-called "mega march" was carried out to demand immigrant amnesty as members of the U.S. Congress debated immigration reform.

A large crowd of immigration protesters wave signs and American flags at the beginning of the April Mega March in Dallas. According to the Dallas Police Department, at least 100,000 people marched in the most well-attended civil movement in the history of Dallas. The protesters demanded the legalization of Hispanic undocumented immigrants, estimated to be about twelve million in the United States. The so-called "mega march" was carried out to demand immigrant amnesty as members of the U.S. Congress debated immigration reform.