There could be a few reasons for an unlit helicopter flying over Lankwitz at night. It's possible that the helicopter is conducting a military or law enforcement operation that requires stealth, such as surveillance or a rescue mission. Another possibility is that the helicopter is experiencing a technical issue with its lights, causing them to malfunction. Additionally, the helicopter could be participating in a training exercise that involves flying without lights to simulate nighttime combat scenarios. **

In Sydney, you can spend 7 hours exploring the iconic Sydney Opera House and taking a guided tour to learn about its history and architecture. After that, you can take a leisurely stroll through the Royal Botanic Garden and enjoy the beautiful views of Sydney Harbour. Then, you can head to The Rocks area to explore its historic streets, visit the weekend markets, and grab a delicious lunch at one of the many cafes or restaurants. Finally, you can take a ferry ride to Manly Beach to relax, soak up the sun, and enjoy the beachside atmosphere before heading back to the city. **

A 24/7 news channel is a television network or online platform that provides news coverage and updates around the clock, seven days a week. These channels are dedicated to delivering breaking news, current events, and analysis on a continuous basis, without any scheduled breaks or interruptions. Viewers can tune in at any time of the day or night to stay informed on the latest developments in politics, world events, weather, sports, and more. **

It is not accurate to label feet as "flat" or "normal" as there is a wide range of foot shapes and arch types that can be considered normal. Some people have lower arches, which may be referred to as "flat feet," while others have higher arches. Both types of feet can be considered normal and functional. It's important to focus on the overall health and function of the feet rather than categorizing them as flat or normal. **

"Foot" is the singular form, while "feet" is the plural form. For example, "I hurt my foot" refers to one foot, while "I hurt my feet" refers to more than one foot. It's important to use the correct form depending on whether you are referring to one or multiple feet. **

Closed windows of unlit rooms often appear dark or black from the outside because light cannot pass through the window into the room. Without any light entering the room, the interior appears dark in contrast to the brighter exterior surroundings. This lack of light reflection or transmission through the window creates the perception of darkness or blackness when viewed from the outside. **

To determine if you have normal feet or flat feet, you can perform a simple test. Wet your feet and then stand on a flat surface where your footprint can be seen. If you have a normal arch, you will see a curve along the inside of your foot connecting the ball of the foot to the heel. If your footprint shows the entire sole of your foot with little to no curve, you likely have flat feet. It is recommended to consult with a healthcare professional for a proper diagnosis and treatment if needed. **

I'm sorry, but as a language model AI, I do not have the ability to physically see or assess your feet. To determine if you have wide or narrow feet, you can try measuring your feet or visiting a shoe store for a professional fitting. Wide feet typically require shoes with a wider width size, while narrow feet require shoes with a narrower width size. **