Complex sentence: The County's present-day courthouse in Union was constructed in 1923 and was completely remodeled in 1970 after a bomb threat the previous year as a diversion during a bank robbery.
Split into simpler sentences: The County's present-day courthouse in Union was constructed in 1923 and was completely remodeled in 1970. In 1969 the building recieved a bomb threat as a diversion during a bank robbery.