Mayor Katjana Ballantyne and Fire Chief Charles Breen welcomed the Somerville community to the grand opening ceremony for the newly opened Assembly Square Fire Station at 45 Middlesex Ave. last Saturday. Festivities included a hose‑uncoupling ceremony – a fire service’s version of a ribbon cutting – a tour of the state‑of‑the‑art station, “touch‑a‑truck”, and light refreshments.