NBC and other organizations use a small plugin program called FileOpen to manage access to their PDF files. FileOpen must be installed and regularly updated in order to successfully open, download, and/or print PDF files.
FileOpen plugin can be downloaded from: https://plugin.fileopen.com/
Adobe Acrobat Reader is also recommended as the best program to open and read PDF files.
Acrobat can be downloaded from: http://get.adobe.com/reader/