The G20 summit is a meeting of the leaders of the world's 20 largest economies, representing both developed and developing countries. The summit provides a platform for these leaders to discuss and coordinate on global economic issues, such as trade, finance, and development. It is an opportunity for countries to work together to address common challenges and promote global economic stability and growth. The G20 summit also serves as a forum for leaders to address pressing international issues, such as climate change, terrorism, and global health crises. **

Breach of convention refers to the violation or breaking of established norms, rules, or agreements within a particular context or society. This can include disregarding traditional customs, failing to adhere to agreed-upon standards, or acting in a way that goes against commonly accepted practices. Breaching conventions can lead to social or legal consequences, as it disrupts the expected behavior and can cause harm or conflict within a community. **

In this context, assembly refers to the process of putting together or constructing something. It involves gathering all the necessary components or parts and assembling them in the correct order to create a final product. This term is commonly used in manufacturing or production settings where various parts are assembled to create a finished product. **

A non-optional social convention refers to a customary practice or behavior that is expected or required in a particular society or culture. These conventions are not optional and are considered necessary for individuals to adhere to in order to be accepted or respected within that social group. Failure to comply with these conventions may result in social consequences or ostracization. Examples of non-optional social conventions include greeting someone with a handshake or bowing in certain cultures, or following specific dress codes for formal events. **

The assembly condition disassembled means that the item is in a state where it has been taken apart or separated into its individual components. This could be for the purpose of transportation, storage, or maintenance. When an item is in the assembly condition disassembled, it is not in its fully functional or operational state and will need to be reassembled in order to be used. **

125 assembly hours refers to the amount of time it takes for a team of workers to assemble a product. This could include tasks such as putting together components, testing functionality, and ensuring quality control. The number 125 represents the total cumulative hours required for the entire assembly process. This measurement is important for planning production schedules, estimating labor costs, and determining the overall efficiency of the assembly process. **

The caricature of the summit conference in Helsinki shows the leaders of the United States and Russia, Donald Trump and Vladimir Putin, sitting at a table with Trump holding a puppet string attached to Putin. This caricature is a satirical representation of the perception that Trump is under the control or influence of Putin, suggesting that Putin is pulling the strings and manipulating Trump. The image reflects the controversy and speculation surrounding the relationship between the two leaders and the potential influence of Russia on the United States. **

A symposium is a formal gathering or meeting where experts in a particular field come together to discuss and exchange ideas on a specific topic. It is often organized as a series of presentations, panel discussions, and Q&A sessions, allowing participants to share their knowledge and insights with each other. Symposia are commonly held in academic and professional settings, providing a platform for networking, collaboration, and learning within a specific discipline or industry. **