The revocation concerns B1 and B2 visas issued in the last 10 years. US set for largest mass visa revocation in history targeting up to 200,000 foreigners, officials say Key points and original sources are listed below.

• The revocation concerns B1 and B2 visas issued in the last 10 years.S1

• US set for largest mass visa revocation in history targeting up to 200,000 foreigners, officials sayS2