More than 200 people have joined blood donation campaigns in Sofia and Burgas, while residents of Plovdiv have also lined up to donate, following the deadly multi-vehicle crashes on the Trakia highway. In Sofia, more than 100 people were waiting outside the National Center for Transfusion Hematology (NCTH) to give blood. The voluntary campaign is being organized by the Bulgarian Red Cross (BRC), Sofia Municipality and the NCTH, and is scheduled to run until 2:00 p....