This timeline provides a brief history of the events leading up to and resulting from the negotiation of the NPT. You can double-click anywhere on the timeline to zoom forward, or use the slider along the bottom to navigate back and forth through the events. Click on any single event to get more details about it. You can toggle back and forth between 2D and 3D view using the button in the bottom left-hand corner of the timeline. Clicking the button in the bottom right-hand corner will give you the option to search for a particular event, select which categories you want to view, or change the format of the timeline.