Coal miners protested on Tuesday against the Trump administration‘s delay of a rule that would protect miners from black lung disease.

Coal miners gathered in front of the Labor Department in Washington, D.C., to accuse President Donald Trump of not doing enough to protect them from black lung disease, a condition caused by inhaling coal and silica dust. The miners are asking the Trump administration to impose a rule that limits silica dust, as an existing rule has been stalled in court for several months.