The family of Trayvon Martin, the young black teenager killed by a neighbourhood watch guard in Florida in February, have come to London to thank the British public for their support.
Trayvon's death sparked an outcry across America,and shocked millions of people, including President Obama. His family received messages of sympathy from around the world.
One of those who wrote to pass on her condolences was Doreen Lawrence, whose son Stephen was murdered by a racist gang in Eltham 19 years ago.
Today Trayvon Martin's family visited the bus stop where Stephen was murdered, and toured the Stephen Lawrence centre in Deptford, which provides education and training for disadvantaged young people.