A large crowd partied through the night and into the morning, with special managed access to the Stonehenge stone circle extended until 8:30 a.m. on Sunday as people celebrated the summer solstice .  "As the sun rose on the year's longest day, we welcomed more than 20,000 people to celebrate together, with thousands more joining via our livestream from across the world," English Heritage, which administers the Stonehenge site, said on Sunday.  On June 21, the Earth's Northern Hemisphere is