More than 100 pages of 'war room notes' released by congressional investigators on Tuesday offer a window into the chaos that overwhelmed the Obama administration as the federal health insurance marketplace started up last month and officials realized that its problems could not be fixed quickly. The documents were made public just as Marilyn B. Tavenner, the administrator of the Centers for Medicare and Medicaid Services, who oversaw the creation of the troubled website, wrapped up her testimony at a Senate hearing in which she faced tough questioning from Democrats and Republicans alike.