Allow -Follow to join -benefits for F-4 ( Family Preference Immigrant Visas).
Allow sisters/brothers of US Citizens to Join parents when they are being petitioned by their US Citizen Son/Daughter already In the U.S.
These type of visas can take up to 24 years. Allow them to join their parents and get a visa number at the same time. Some children can't just be left behind. They should be allowed to immigrate with their parents or without ,when a U.S Citizen is petitioning for them. LEGAL IMMIGRATION!