The articles can be viewed online in either Rich Text Format (RTF) file or as an Adobe Portable Document Format (PDF) file. Note: You need Acrobat Reader to read the PDF files. Free Acrobat PDF reader software is available for downloading. What happens when the expat returns home? Adobe Portable Document Format (PDF) – 373 KB What happens when the expat returns home? Rich Text Format (RTF) – 177 KB