The 2006 renewal and re-equipment effort has resulted in the acquisition of specific equipment (main battle tanks, artillery, unmanned air vehicles and other systems) to support the mission in Afghanistan. It has also encompassed initiatives to renew certain so-called "core capabilities" (such as the air force's medium range transport aircraft fleet – the C-130 Hercules – and the army's truck and armoured vehicle fleets). In addition, new systems (such as C-17 Globemaster III strategic transport aircraft and CH-47 Chinook heavy-lift helicopters) have also been acquired for the Armed Forces. Although the viability of the Canada First Defence Strategy continues to suffer setbacks from challenging and evolving fiscal and other factors, it originally aimed to: