New problems emerge with health-care Web site; Sebelius acknowledges frustrations

New problems emerged Wednesday with the implementation of President Obama’s health-care law even as Health and Human Services Secretary Kathleen Sebelius assured lawmakers that “miserably frustrating” problems with a nearly month-old health-insurance Web site would soon be fixed.

The Web site, HealthCare.gov, was down again most of the morning while Sebelius was testifying before a House committee. And new security issues with the site were raised Wednesday after an internal memo obtained by The Washington Post and other media outlets showed that, days before the Web site’s launch, administration officials...