Portuguese Air Force STAFF Sergeant (SSGT) Silvia Sousa (left) and AIRMAN First Class (A1C) Sonia Monas, both Medical Technicians, takes the blood pressure of a visiting guest, at one of the many booths set up during the Air Base 4 Open House, at Air Base 4, Lajes Field, Azores. Host nation, Air Base 4, welcomed the public and military members to observe the various jobs they facilitate on base