As demand for air travel reaches historic lows amid the COVID-19 pandemic, passenger Erin Strine was shocked to board a nearly full American Airlines flight from New York to Charlotte on Saturday.

Strine observed many passengers were sitting side by side and not wearing masks. She posted a video to Twitter, which as of Monday evening, has been viewed almost two million times – -strengthening union calls for more protection and more aggressive policies on social distancing.

“It was the first time that I felt truly unsafe,” Strine said. She was traveling to see her family following the passing of her grandmother. “I wanted to come home to be here for my parents, and my dad especially, you know it wasn’t a decision I made lightly.”