By, Boston.com StaffAs rioters began to storm the Capitol building in Washington, D.C., last week, Congresswoman Ayanna Pressley’s staff barricaded the doors to their office — and made a startling discovery.“Every panic button in my office had been torn out — the whole unit,” Sarah Groh, Pressley’s chief of staff, to The Boston Globe.The buttons had been used before, and Groh said she had not switched offices since then. Exactly why they were not there when supporters of President Donald Trump sieged the halls of Congress was unclear to the staff, she said.Pressley, her husband, and Groh...…By, Boston.com StaffAs rioters began to storm the Capitol building in Washington, D.C., last week, Congresswoman Ayanna Pressley’s staff barricaded the doors to their office — and made a startling discovery.“Every panic button in my office had been torn out — the whole unit,” Sarah Groh, Pressley’s chief of staff, to The Boston Globe.The buttons had been used before, and Groh said she had not switched offices since then. Exactly why they were not there when supporters of President Donald Trump sieged the halls of Congress was unclear to the staff, she said.Pressley, her husband, and Groh...WW…