Day 3 of The Palestine Papers, Al Jazeera's months-long investigation into thousands of leaked Israeli-Palestinian negotiating documents, just went live - and today it's all about security.

The Madhoun assassination. The Palestine Papers include the hand-written notes of a 2005 meeting between Israeli defence minister Shaul Mofaz and Palestinian interior minister Nasser Youssef - in which they discuss the possible assassination of a leading member of the Al Aqsa Martyrs Brigades.

Fatah vs. Hamas. The papers suggest that Fatah was obsessed with maintaining its primacy over Hamas, and that it devoted considerable energy to cracking down on the group. Members of the PA brag to Israeli and American interlocutors about their efforts to crack down on sermons in mosques and the number of Hamas activists they've arrested.

One senior PA negotiator, Ahmed Qurei, even went so far as to ask Israel to re-occupy the Philadelphi crossing - the border between Gaza and Egypt - as a way of weakening Hamas.

Britain's role. We take a look at Britain's role in training and funding the Palestinian security forces, several of which have been widely linked to torture and an unbelievable proposal by the MI-6 spy service, which suggested a plan to detain Hamas and Islamic Jihad leaders.

Demanding demilitarization. The Israeli negotiators insisted on a permanent military presence in the West Bank, control over the Palestinian airspace, and myriad other restrictions on the future Palestinian state.

Plus, there's another batch of new commentary: Alastair Crooke writes on Tony Blair's role and the issue of demilitarization Mark Perry examines what the papers say about Keith Dayton's training mission in the West Bank Robert Grenier pens an open letter to the Israeli people and Ali Abunimah expands on the PA's plans for Philadelphi.