washington u.s. president barack obama australian prime minister malcolm turnbull pledge tuesday increase cooperation counterterrorism fight islamic state obama praise australia support afghanistan thank prime minister country troop sacrifice around world go talk strengthen cooperation syria iraq state affairs afghanistan also counter violent extremism globally obama tell reporters oval office start meet australia important partner process say turnbull say critical improve efforts fight islamic state constantly lift game way engage tackle extremists particularly isil many others operate cyber sphere say refer islamic state acronym archaic barbaric though may use regrettably internet sophisticate please go work even close collaboration there two leaders also discuss back trans-pacific partnership trade pact go good economy go good workers businesses reaffirm order us thrive 21st century ... important us make rule region exactly tpp obama say turnbull congratulate obama implementation iran nuclear deal obama australia 's turnbull pledge cooperation counterterrorism