F16 fighter jets from the United Arab Emirates arrive at an air base in Jordan yesterday.

AFP/Beirut

Jordan announced yesterday it conducted dozens of air strikes on the Islamic State group that murdered one of its pilots, as part of an international assault Washington says is bearing fruit.
Air Force chief Major General Mansour al-Jobour told reporters the kingdom had launched 56 air raids on IS since Thursday.
“On the first day of the campaign to avenge our airman Maaz al-Kassasbeh, 19 targets were destroyed, including training camps and equipment,” he said, reading from a prepared text.
Jordan has vowed to crush IS after the militants burned alive Kassasbeh, who was captured in December when his F-16 warplane went down in Syria.
Eighteen more targets including ammunition and fuel depots and logistics centres were hit on Friday.
On Saturday, 19 IS targets were destroyed, including barracks and residential centres.
“So far, the campaign has destroyed 20% of the fighting capabilities of Daesh,” he said using another name for IS which controls swathes of both Syria and Iraq.
Jordan is part of the US-led coalition of Arab and Western countries that has been carrying out air strikes against IS since September.
State media reported that a squadron of UAE F-16 fighter jets arrived yesterday in Jordan escorted by pilots and technicians.  
C-17 transporters and refuelling planes were part of the squadron sent to on the orders of Abu Dhabi Crown Prince Mohamed bin Zayed al-Nahyan, the Petra news agency said.
US Secretary of State John Kerry said the aerial campaign on IS in Iraq and Syria was beginning to win back territory seized by the militants and deprive the group of key funds.
There have been 2,000 air strikes on IS since the coalition’s formation in August, Kerry told the Munich Security Conference.
The air war had helped to retake some 700sq km of territory, or “one-fifth of the area they had in their control”, he said.
The top US diplomat did not specify whether the regained territory was in Iraq or Syria.
But he added the coalition had “deprived the militants of the use of 200 oil and gas facilities... disrupted their command structure... squeezed its finance and dispersed its personnel”.
Jordan’s Foreign Minister Nasser Judeh said that while the bombing campaign had “degraded” IS capability, the group was still in control of “vast territory”.
“They still have access to Syria’s cash and funds. They have access to weaponry. They’re not gone as a threat yet,” Judeh told ABC television.
Interior Minister Hussein Majali said in remarks published on Saturday that Kassasbeh’s gruesome murder by IS was a “turning point” in the kingdom’s fight against extremism.
“The day of the hero, martyr pilot’s assassination is a turning point in Jordan’s history in order to face this horrific crime that was committed by the cowardly terrorist organisation,” he said.
Jobour said more than 7,000 IS militants had been killed since Jordan began participating in coalition air strikes.
Following Jordan’s intensified sorties, the group claimed US hostage Kayla Jean Mueller had been buried alive under rubble in its self-proclaimed capital of Raqa in Syria.  
Mueller’s parents said they were hopeful the 26-year-old aid worker was still alive and appealed to IS to contact them in order to ensure her safe return.  
Yesterday, US Secretary of Homeland Security Jeh Johnson said Washington was seeking clarification on Mueller’s fate.
“We’re learning as much as we can as quickly as we can about Ms Mueller’s situation,” he told CNN. “Our thoughts, our prayers are with her family right now.”