Because it would be very embarrassing if the Russians beat them to it.
It didn't "scare" the US, they already had a satellite planned, a much more capable one. They just didn't rush to get it launched first.
Satellite - US band - was created in 2010.
Nhl satellite
the name of the satellite was called Explorer
The first successful US satellite , Explorer launched 1/31/58
The first successful US satellite , Explorer launched 1/31/58
Satellite tell us if there is a natural disaster happening.
The phrase "the satellite" implies that you have a specific satellite in mind. However, you have not stated which satellite and so it is not possible to answer the question. A further complication is that you have provided no time limit. It is almost certain that a satellite will hit someone in the US over the next few billion years - although the country may not be called the US then!
United States Satellite Broadcasting was created in 1981.
United States Satellite Broadcasting ended in 1998.
The US spy satellite USA 193 was intercepted and destroyed by a missile on February 21st, 2008.
No satellite has weapons on them, but there are some that can protect us from missile launches by detecting them (but the satellite cannot shoot it down).