CLEAN : Canada Parliament lockdown finally ends

The transcript describes a prolonged incident where people were kept inside a building due to a security situation. It started around 10:30 AM and lasted for about 16 hours. During this time, people remained calm and entertained themselves with activities like playing cards and hockey. The situation was caused by one individual, and safety measures were taken by moving people to a secure part of the building.

What was the general atmosphere inside the building during the incident?

Describe the safety measures taken during the incident.