The presumptive democratic nominee, Joe Biden has made his first appearance since 10 weeks after been put on coronavirus isolation.The 77 year-old,accompanied by his wife, Jill wore a black face mask and dark shades while he laid a wreath of white roses at a veterans park near his home in Delaware to mark Memorial Day.He saluated about a dozen veterans and other onlookers and thanked them for their service, while maintaining social distancing.