SAN FRANCISCO (AFP) - The pan-Arab news giant Al-Jazeera bought Current TV, a struggling US cable channel, Wednesday in a deal aimed at giving the Qatar-based broadcaster the scope to challenge major American TV networks. Current, co-founded by former US vice president Al Gore, announced the sale in a statement that was later confirmed by Al-Jazeera. The acquisition will allow the latter to reach millions more US homes than it does at present. The financial terms of the deal were not immediately disclosed, but Forbes reported that a possible value of $400 million could net Gore $100 million.