Explore the World Trade Center site
This picture by Mark Lennihan/AP was taken in March 2011.
'What I learned retracing the Hatton Garden thieves' footsteps'
The people who pimp, race and crash mobility scooters
The men who hunt huge prey with rowing boats and spears
Why good-looking runners attract more donations
The best of the week's reads
- Music boss Len Blavatnik named as Britain's richest man
- Nepal earthquake: Rescue effort intensifies
- Hatton Garden raid: Vault owner 'not contacted by police'
- Russian hackers 'accessed Obama's unclassified emails'
- Putin-backed bikers begin controversial ride to Berlin
- Baltimore Freddie Gray death protest turns violent
- Nepal earthquake: Newlyweds among Britons caught in disaster
- Hunting whales with rowing boats and spears
- Election 2015: Labour plan to stop 'massive' rent increases
- Election 2015: David Cameron sets out plan for 'first 100 days'