Facebook says it has successfully tested a computer program that can help keep users from taking their own lives. The social media network now says it will expand the use of the pattern recognition software to other countries. Facebook began testing the software in the United States in March. The software is considered an example of artificial intelligence. In February, Facebook chief Mark Zuckerberg wrote in a statement that artificial intelligence could be used to help keep people safe. The software scans messages on Facebook for comments that could be signs that a person intends to harm themselves. Facebook has not released any of the technical details about the program. But, the company did say that it looks for phrases such as “Are you ok?” and “Can I help?”