by Stanislaw WASZAK Agence France Presse GDANSK, Poland (AFP) — Thousands of people joined marches across Poland to pay tribute to the centrist mayor of Gdansk who died Monday, a day after being stabbed in the heart at a charity event. Pawel Adamowicz died in hospital after a day-long fight by doctors to save him. “Despite all our efforts, we failed to save him,” Doctor Tomasz Stefaniak, director of Gdansk University hospital, told Polish media. […]