charlesetta taylor , 79 , may have her home of 70 years torn down by the city of st. louis .
this so the city can make way for a campus for the national geospatial-intelligence agency .
the city may also tear down 49 other homes to make sure the nga does not leave the city , and take the 3,000 jobs it provides .
there are three other sites being looked at that would not displace as many people .