![is.jpg](https:// occurred during that special broadcast on July 23, 1962, which aired in Canada and 16 European countries and on all three major American networks. Telstar could only broadcast signals when it was visible to ground stations on both sides of the Atlantic, meaning there was only a 20-minute transmission window during each two-and-a-half-hour orbit./DQmUT6yffLYEW9h5VDje4AJTGEaryfPQ875BUJMPUEmKdFA/is.jpg)