A new poll finds a majority of the public — especially those lacking health coverage — is unaware that new insurance marketplaces created by the health law are slated to open next week. The poll also found deep skepticism of media coverage of the law, with more than half the public saying they don't trust any media source to provide credible information. Two-thirds of the public were not aware when the new online marketplaces open to allow people without employer coverage to shop and purchase their own health policies, according to the poll by the Kaiser Family Foundation. (KHN is an editorially independent program of the foundation.) These exchanges open Tuesday.