NBC suit
An NBC (nuclear, biological, chemical) suit, also called a chemsuit or chem suit or chemical suit is a type of military personal protective equipment. NBC suits are designed to provide protection against direct contact with and contamination by radioactive, biological or chemical substances, and provides protection from contamination with radioactive materials and some types of radiation, depending on the design. It is generally designed to be worn for extended periods to allow the wearer to fight (or generally function) while under threat of or under actual nuclear, biological, or chemical attack. The civilian equivalent is the Hazmat suit. The term NBC has been replaced by CBRN (chemical, biological, radiological, nuclear), with the addition of a new threat, radiological, meaning radiological weapon.
NBC
NBC's master feed is transmitted in 1080i high definition, the native resolution format for NBCUniversal's television properties. However, 19 of its affiliates transmit the network's programming in 720p HD, while four others carry the network feed in 480i standard definition either due to technical considerations for affiliates of other major networks that carry NBC programming on a digital subchannel, or because a primary feed NBC affiliate has not yet upgraded their transmission equipment to allow content to be presented in HD.