Final answer:
In the event of an accident or delay involving a shipment of nuclear weapons, several parties would be notified, including government agencies, law enforcement, emergency response agencies, and international organizations like the IAEA.
Step-by-step explanation:
In the event of an accident or delay involving a shipment of nuclear weapons, several parties would be notified. These parties typically include the relevant government agencies and officials responsible for the transportation and handling of nuclear weapons, as well as the appropriate law enforcement and emergency response agencies. Additionally, international organizations such as the International Atomic Energy Agency (IAEA) may also be notified.