An anonymous reader writes "Homeland security officials on Wednesday abruptly shelved a proposal to build a national database of license-plate scans after criticism from privacy advocates. The proposal, which had been posted online last week by the office of Immigration and Customs Enforcement, sought a contractor who could establish a searchable database of license plates, with the times and locations where they were spotted by traffic cameras and other sources. But in a statement late Wednesday, the department announced a reversal. 'The solicitation, which was posted without the awareness of ICE leadership, has been canceled,' said spokeswoman Gillian Christensen. 'While we continue to support a range of technologies to help meet our law enforcement mission, this solicitation will be reviewed to ensure the path forward appropriately meets our operational needs.'"