guidance was translated into an incoherent military planning on the operational level. Such a gap may impact the future NATO's operations that will probably face trust issues. Costs On 22 March 2011, BBC News presented a breakdown of the likely costs to the UK of the mission. Journalist Francis Tusa, editor of Defence Analysis, estimated that flying a Tornado GR4 would cost about £35,000 an hour (c. US$48,000), so the cost of patrolling one sector of Libyan airspace would be £2M–3M (US$2.75M–4.13M) per day. Conventional airborne missiles would cost £800,000 each and Tomahawk cruise missiles £750,000 each. Professor Malcolm Charmers of the Royal United Services Institute similarly suggested that a single cruise missile would cost about £500,000, while a single Tornado sortie would cost about £30,000 in fuel alone. If a Tornado was downed the replacement cost would be upwards of £50m. By 22 March the US and UK had already fired more than 110 cruise missiles. UK Chancellor George Osborne had said that the MoD estimate of the operation cost was "tens rather than hundreds of millions". On 4 April Air Chief Marshal Sir Stephen Dalton said that the RAF was planning to continue operations over Libya for at least six months. The total number of sorties flown by NATO numbered more than 26,000, an average of 120 sorties per day. 42% of the sorties were strike sorties, which damaged or destroyed approximately 6,000 military targets. At its peak, the operation involved more than 8,000 servicemen and women, 21 NATO ships in the Mediterranean and more than 250 aircraft of all types. By the end of the operation, NATO had conducted over 3,000 hailings at sea and almost 300 boardings for inspection, with 11 vessels denied transit to their next port of call. Eight NATO and two non-NATO countries flew strike sorties. Of these, Denmark, Canada, and Norway together were responsible for 31%, the United States was responsible for 16%, Italy 10%, France 33%, Britain 21%, and Belgium, Qatar, and the UAE the remainder. Aftermath Since the end of the war, which overthrew Gaddafi, there has been violence involving various militias and the new state security forces. The violence has escalated into the Second Libyan Civil War. Critics described the military intervention as "disastrous" and accused it of destabilizing North Africa, leading to the rise of Islamic extremist groups in the region. Libya became what many scholars described as