NEW CASTLE, Del. (AP) – Joe Biden has marked Memorial Day by laying a wreath at a park near his Delaware home. It was the presumptive Democratic presidential nominee’s first public appearance in more than two months. Biden and his wife, Jill, placed a wreath of white flowers tied with a white bow, and bowed their heads in silence at the park. It was a low-key, unannounced appearance, and there was no crowd waiting for him. Yet the appearance was a milestone in a presidential campaign that has largely been frozen by the coronavirus outbreak. Biden wore a mask, unlike Trump at his public events.