Common secrets in air travel include the fact that flight attendants often have secret codes and signals to communicate with each other, such as indicating the location of an unruly passenger. Another secret is that airlines sometimes intentionally overbook flights, knowing that a certain percentage of passengers will not show up, in order to maximize their revenue. Additionally, many airlines have hidden compartments on the plane for storing medical supplies and other emergency equipment. **

The common ivy, also known as Hedera helix, is common because it is a highly adaptable and resilient plant that can thrive in a wide range of environmental conditions. It is also a vigorous grower and can quickly spread and cover large areas, making it a popular choice for ground cover and landscaping. Additionally, its ability to climb and cling to various surfaces, along with its attractive evergreen foliage, has made it a popular choice for both ornamental and practical purposes in gardens and landscapes. **

The most common connections in long-distance travel are typically made through major transportation hubs such as airports, train stations, and bus terminals. These hubs serve as central points where travelers can transfer between different modes of transportation to reach their final destination. Additionally, long-distance travel often involves connections between different transportation companies or carriers, such as transferring from one airline to another for international flights or switching between train lines for cross-country travel. Overall, the most common connections in long-distance travel occur at major transportation hubs and between different modes of transportation. **

The common wolf is referred to as "common" because it is one of the most widespread and abundant species of wolves in the world. They can be found in a variety of habitats across North America, Europe, Asia, and Africa. Their adaptability and ability to thrive in different environments have contributed to their widespread distribution and common status. **

Common good refers to the overall well-being and benefit of society as a whole, focusing on the collective welfare and interests of all individuals. On the other hand, common will refers to the shared desires, intentions, or decisions of a group of people, reflecting their unified purpose or goal. While common good emphasizes the outcome or result that benefits everyone, common will emphasizes the shared intention or will of a group to achieve a particular objective. **

At airport security, passengers are required to place their carry-on luggage, personal items, and sometimes shoes in bins to be scanned by X-ray machines. Passengers must also walk through metal detectors or body scanners to ensure they are not carrying any prohibited items. Security personnel may conduct additional screenings if necessary, such as pat-downs or swab tests for explosive residue. Overall, the goal of airport security is to ensure the safety of passengers and prevent any potential threats from entering the aircraft. **

Common rue (Ruta graveolens) is not typically considered edible due to its bitter taste and potential toxicity. Ingesting large amounts of common rue can cause stomach irritation, vomiting, and other adverse effects. However, in some cultures, small amounts of common rue leaves are used as a flavoring agent in dishes, but caution should be exercised due to its potential toxicity. It is always best to consult with a healthcare professional or a botanist before consuming any plant for culinary purposes. **

Yes, it is common here. **