Missing Titanic sub search in critical phase amid fears over oxygen levels

Missing Titanic submersible: The health risks facing the crew

Missing Titanic sub search team expand search area as oxygen fears mount

Explorer's harrowing experience of being trapped at Titanic stern in 2000

Titan sub has heated walls, private toilet and games console controller

Jocelyn Chia: US comedian calls Malaysia's reaction to MH370 joke 'ridiculous'

Madeleine McCann: German police says objects analysed after Portugal search

Madeline McCann search analysis 'will take several weeks'

Madeleine McCann: Reservoir search appears to be over

16 years of dashed hopes and false claims: How the disappearance of Madeleine McCann captivated the world

Madeleine McCann: Police begin searching Portugal reservoir

Madeleine McCann disappearance: A timeline