Marines claim $3.5bn F-35B fighter jet is finally ready for service even though it was outperformed by a 40 year old F-16 and lacks the software to fire its own cannons

However, the Marine Corp has declared initial operational capability for their first squadron of F-35Bs. 

The declaration means that the squadron of 10 F-35Bs stationed with Marine Fighter Attack Squadron 121 in Yuma, Ariz., are 'ready for worldwide deployment,' the Marine Corps said in a statement. 

The declaration means that the squadron of 10 F-35Bs stationed with Marine Fighter Attack Squadron 121 in Yuma, Ariz., are 'ready for worldwide deployment,' the Marine Corps said in a statement.

Marine Corps Commandant Joseph Dunford said the stealthy fifth-generation fighter 'will transform the way we fight and win.' 

'I am pleased to announce that VMFA-121 has achieved initial operational capability in the F-35B, as defined by requirements outlined in the June 2014 Joint Report to Congressional Defense Committees.'

'It is capable of conducting close air support, offensive and defensive counter air, air interdiction, assault support escort and armed reconnaissance as part of a Marine Air Ground Task Force, or in support of the Joint Force.'

However, some have said the declaration is simply a PR stunt.