Cuba's communist model needs "urgent changes" to overcome a major crisis which cannot be blamed solely on a crippling US oil blockade, President Miguel Díaz-Canel said in his frankest admission yet of the need for radical reforms. ADVERTISEMENT ADVERTISEMENT While Havana's impulse has been to blame its problems on a more-than-six-decade US trade embargo and more recent blockade, Díaz-Canel admitted in remarks broadcast on Thursday there were "obstacles that don't come from outside, nor the