What a FIRST night for #teamarena 🇺🇸🔥 🏆 Gretchen Walsh — 50 Fly GOLD + Championship Record 🥇 🌎 4x100 Mixed Medley Relay GOLD + WORLD RECORD 🥈 Kate Douglass — 50 Fly SILVER 🌎 4x100 Mixed Medley Relay GOLD + WORLD RECORD 🥈 Summer McIntosh — 200 Free SILVER The energy is HERE. ⚡️ Bring on Day 2. 👊🔥 #panpacs #nolimits #teamarena