Several published reports indicate that top Israeli decision makers now are seriously considering whether to order a military strike on Iran's nuclear facilities, and if so, when. This report analyzes key factors that may influence current Israeli political decisions relating to a possible strike on Iranian nuclear facilities. For Congress, the potential impact-short- and long-term-of an Israeli decision regarding Iran and its implementation is a critical issue of concern. By all accounts, such an attack could have considerable regional and global security, political, and economic repercussions, not least for the United States, Israel, and their bilateral relationship. This report has many aspects that are the subject of vigorous debate and remain fully or partially outside public knowledge.