The Macondo well blowout resulted in 11 fatalities and caused the largest nonintentional oil spill in history. The situation stemmed from a series of human errors through all stages of the project leading up to the blowout and subsequent explosion. These errors include faulty interpretation of signals indicating problems with well and safety system integrity, inappropriate modifications to safety systems, inadequate design of critical systems, failure to provide redundancy in the design stage, failure to adhere to administrative controls for the safe operation, failure to follow the American Petroleum Institute Recommended Practices 75 on drilling mud circulation, and others. Twenty five specific errors have been identified and classified into eight categories. The results show that the majority of the errors are latent errors and caused by poor leadership in the organization or management. In order to resolve these issues it is necessary to create a safety culture in which safety is paramount in operations and facilities. There are many lessons learned from this incident, but the most important lesson is that safety must be a way of life, beginning in the design stage and carrying through the project life cycle.

Standardized survey interviews (n = 325) and guided in-depth interviews (n = 22) were conducted with injection drug users (IDUs) in Long Beach, California, to document drug usage and injection patterns, sexual practices, perceived risk of HIV infection, sources of health information, and knowledge and attitudes about AIDS. Most IDUs reported sharing needles (87.9%), and a large minority reported regular sterilization of needles/syringes (40.3%). Lower rates of needle sharing were reported among cocaine users than among heroin and speedball users. HIV seroprevalence was 5.7 percent (11/194). Sexually active female (60.7%) and male (20.5%) IDUs reported exchanging sex for money or drugs. Overall, 48.3 percent of IDUs reported having made changes in their injection practices and one-third reported modifying their sexual behavior in order to avoid HIV infection. Differences in drug use, sexual practices, and drug treatment history were found with regard to gender, ethnicity, age, and type of drug injected. Implications of findings for the development of AIDS risk-reduction programs are presented.

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