Plans for the Department of Homeland Security to launch a new satellite surveillance system is coming under new criticism on Capitol Hill. Last week, Secretary Michael Chertoff said the satellite surveillance system would be soon ready to go. But now the Wall Street Journal reports Democrats are threatening to shut down the program unless the department does more to address privacy concerns. The satellite program is designed to provide federal, state and local officials with extensive access to spy satellite imagery to assist with emergency response and other domestic security needs. But critics say the Bush administration hasn’t created legal safeguards to ensure that the program won’t be used for domestic spying.