German Chancellor Olaf Scholz and President Frank-Walter Steinmeier will both attend a memorial service on Sunday for victims of the fatal knife attack in the western city of Solingen, government spokesman Steffen Hebestreit said on Friday. It will be the second visit for Scholz to Solingen since the attack on August 23, in which a knife-wielding attacker killed three and wounded eight at a festival on the city’s market square. On Monday, Scholz visited the scene and described the attack as an act of “terrorism against us all.” The suspected attacker is a 26-year-old Syrian migrant who arrived…