1) The pho, a Vietnamese noodle soup, is a signature dish of Vietnamese cuisine. It typically features a flavorful broth, rice noodles, and various toppings, such as thinly sliced beef or chicken, herbs, bean sprouts, and lime. Pho is often enjoyed for breakfast or as a comforting meal any time of the day. It is known for its complex flavors, aromatic herbs, and the balance between the savory broth and fresh ingredients.

2) The Cuban Missile Crisis in 1962 brought the United States and the Soviet Union to the brink of nuclear war during the Cold War.

3) The concept of self-driving cars, or autonomous vehicles, is being actively developed by companies such as Tesla, Google (Waymo), and Uber.

4) The first smartphone, the IBM Simon, was introduced in 1992 and featured a touchscreen, email capabilities, and apps such as a calendar and calculator.