A sign that reads, "Stop 4437, Sensenbrener No" is held up by a protester at a rally to reject anti-immigration legislation before the U. S. Congress.

Protesters carry signs and a Guatemalan flag during a march against anti-immigration legislation in the U. S. Congress.

A Mexican flag is carried during a demonstration to protest anti-immigration legislation.

Two children ride of their parent's shoulders during a march to protest anti-immigrations legislation.

Protesters wearing white shirts carry the flags of the United States and Mexico during a march to show rejection of anti-immigration legislation.

Protesters carry the flags of the United States and Mexico as they march to show their rejection of anti-immigration legislation before the U. S. Congress.

A mariachi band plays during a march to protest anti-immigration legislation being debated by the U. S. Congress.

A sign reading, "Together We Stand Divided We Fall!' is raised above the heads of protesters during a march against anti-immigration legislation.

A sign is lifted above the heads of a line of protesters. The sign reads, "Together We Stand Divided We Fall!" The march was to show rejection of anti-immigration legislation being debated before the U. S. Congress.

A line of protesters carry sign and the flags of the United States and Mexico as they march against anti-immigration legislation being debated in the U. S. Congress.

A mariachi band joins the line of protesters during a march to reject anti-immigration legislation before the U. S. Congress.

A woman helps to hold up a flag during a march against anti-immigration legislation.

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

Protesters carry signs and flags as they march to show their rejection of anti-immigration legislation.

Two signs are held up by women protesting against anti-immigration legislation. The signs read, "We Are Not Divided But United, No HR 4437," and "We Want Another [A]mnesty."

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

A Mexican flag is carried by a protester during a demonstration against anti-immigration legislation.

Participants in a march to protest anti-immigration legislation carry a banner with the number of the legislation (4437) they oppose. Others wear tee shirts printed with the message, "We are not criminals."

Signs printed with the image of the U. S. flag are carried by marchers protesting anti-immigration legislation.

Two women raise their arms and chant during a march to protest anti-immigration legislation being debated in the U. S. Congress.

A woman raises her arms as she marches to show her rejection of anti-immigration legislation.

Photo of immigration protesters of varying ages carry a large banner. 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.

Next to Cathedral Santuario de Guadalupe (Cathedral Shrine of Our Lady of Guadalupe) in Dallas, a female protester holds up a bright yellow sign that says, "Queremos la Reforma Migratoria Justa y Necesaria!" 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 waving American flags march past a "Cathedral Guadalupe" sign and the Cathedral Santuario de Guadalupe (Cathedral Shrine of Our Lady of Guadalupe) of Dallas in the background. 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.