It depends what system you are talking about
Answer:
whose lives were at risk if they stayed behind.
Explanation:
By 1974, it became certain that the Republic of Vietnam would fall. Thousand of southern Vietnamese were escaping by sea and air. The Northern Vietnamese troops were at the border of the southern capital of Saigon by April 1975. The President of the United States gave order for the evacuation of U.S civilians and the Vietnamese who were at risk. Around seven thousand people were evacuated by airlifts in the final phase of evacuation called Operation Frequent wind.
The Silk Road was an ancient road that stretched through Asia and the Middle East, where fine goods were traded from one person to another. It opened during the Han dynasty (130 bce), but was closed in 1453 ce, when the Ottoman empire boycotted trade with the west and shut down the routes.
The correct answer for this question would be BBC Pips Greenwich Time Signals. The another name for the hourly time signal or GTS first broadcast by the RGO in 1924 is called BBC Pips Greenwich Time Signals. <span>For 75 years the major global news headlines of the day have been preceded by the six Greenwich Time ‘pips’. Hope this answer helps.</span>
