By Gauri van Gulik, Deputy Europe Director at Amnesty International. Follow Gauri on Twitter @GaurivanGulik.
A solemn moment of silence. The world over, this is the traditional response when lives are cut short by tragedy.
It has also been a common response to tragedies in Europe and off its shores which have ended the lives of thousands of refugees and migrants. Not killed by bombs in Syria, but killed while making terrifying journeys in search of safety and better lives in Europe.
But the scale and rapid succession of these tragedies calls for breaking the silence.
In the space of a week, along with people across the world, I recoiled in horror as four new tragedies added to a growing list of events that have already brought a record number of refugees and migrants to untimely deaths this year. According to UNHCR, 2,500 have already perished en route to Europe since 1 January 2015.
On 26 August, 52 bodies were found inside the hull of a ship about 30 nautical miles off the coast of Libya.