San Diego is a city next to the Mexican-American border on Southern California's Pacific coast. With a population of more than 1.4 million, it is the eighth most populous city in the United States and the second most populous in California. Meanwhile, the San Diego metropolitan area, which has more than 3.3 million inhabitants, is the 18th largest metropolitan area in the country. The county seat of San Diego County is San Diego. It is well-known for its wide beaches and parks, moderate Mediterranean climate, long history with the US Navy, and its recent rise to prominence as a hub for the development of biotechnology, electronics, wireless, and healthcare.

Cairo isn’t just the capital of Egypt — it’s the pulse of the nation. A city where ancient history meets modern chaos, where the call to prayer rises above the traffic, and where every alley seems to hum with life. Home to over 10 million people, Cairo is one of the biggest and most energetic cities in the Middle East and Africa. It’s a place of contrasts — the timeless Pyramids of Giza just a short drive from bustling markets, rooftop cafés, and shiny new malls. The Greater Cairo Metropolitan Area, with more than 22 million residents, is among the most populated urban regions on Earth. Surrounded by ancient sites like Memphis, Heliopolis, and the Giza Plateau, Cairo is a living bridge between Egypt’s past and its future. The city’s origins trace back to Fustat, Egypt’s first Islamic capital founded in 641 CE, and later to 969 CE, when the Fatimid dynasty created what we now call Cairo. Through centuries — under the Ayyubids, Mamluks, and beyond — the city became Egypt’s heart of architecture, art, and learning.