Indian Navy – India starts to overhaul its Sea King helicopters in order to respond to Pakistan’s new submarine threat.

• The Telegraph: Submarine tracker gets new life

Background – Piracy – As leaders of the NATO military alliance head for a summit at which new measures against shipborne terrorism will be on the agenda, there are worries that world trade may be disrupted by new anti-terror rules for ports and ships that are about to come into force

• The Economist: Perils on the sea

Background – NATO – What is the North Atlantic Treaty Organisation, or Nato, really for? It’s a question that has dogged the alliance ever since the ending of the Cold War.

• BBC: Future of Nato under spotlight

Background – Iraq – John Keegan on what America must do in Iraq.

• The Daily Telegraph: The nation-building lessons Washington has to learn