There are a range of organisms which occur naturally, such as anthrax and tularemia, viruses such as smallpox, and toxins including the deadly botulinum, one of the most poisonous substances known. Given the right technology, these are capable of being processed into weapons-grade material. In an interview published in Dawn, Pakistan's main English-language daily paper, Osama bin Laden claimed he had access to both nuclear and chemical weapons and would use them as a deterrent.