Iran: Sanctions could push nuclear drive
President Mahmoud Ahmadinejad on Monday warned that Iran would respond to additional U.N. sanctions with new nuclear advances, in yet another show of defiance to international demands that the country roll back its atomic program. The U.N. Security Council has set a deadline of late May for Iran to halt its uranium enrichment program, warning it will gradually ratchet up its punishments. The council imposed limited sanctions in December and strengthened them slightly last month because of Iran’s refusal to suspend enrichment.