Complex sentence: The risk to activists and any blacks in the South was high and remained so; according to a later report from the NAACP's Southern Regional Council in Atlanta, the homes of forty black Southern families were bombed during 1951 and 1952.
Split into simpler sentences: The risk to activists and any blacks in the South was high and continued to be so. According to a later report from the NAACP's Southern Regional Council in Atlanta, the homes of forty black Southern families were bombed during 1951 and 1952.