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Protesters opposed to Arizona's Immigration Law SB 1070 march through downtown Phoenix April 25, 2012 in Phoenix, Arizona. The Supreme Court's ruled to strike down most, but not all, of the controversial provisions. Pro-immigrant groups are waiting to see what that will mean going forward.
The federal government wasn't alone in suing Arizona over its immigration law. The ACLU of Arizona also has a lawsuit pending over SB 1070.
No one is exactly sure what the ruling will mean for residents interacting with law enforcement.
There are a lot of unanswered questions, says Alessandra Soler, executive director of the ACLU of Arizona. At the moment, her organization is most concerned about detentions.