 It provides assessments to the Prime Minister, other Ministers, senior officials and New Zealand's diplomatic missions abroad, on events and developments that bear on New Zealand's interests, especially in regard to matters of national security.The NAB is responsible for collecting and analysing information on external matters which may affect New Zealand, including foreign states, individuals, and events.It draws its information from a range of public and confidential sources including the Security Intelligence Service (NZSIS), Government Communications Security Bureau (GCSB), New Zealand diplomatic posts, academic discourse, the media, and other publicly available sources.