U.S. Secretary of State John Kerry, right, and EU foreign policy chief Catherine Ashton, left, visit the media seating area of Kerry's aircraft as it sits on the tarmac at Geneva International airport before leaving for London, Sunday, Nov. 24, 2013, in Geneva, Switzerland. WASHINGTON (AP) - Republicans in Congress are skeptical about the Iran nuclear deal hammered out by the U.S. and world powers. The agreement announced Sunday in Geneva commits Tehran to curb its nuclear activities for six months in exchange for limited and gradual reliefs from global economic penalties. Rep. Howard "Buck" McKeon, chairman of the House Armed Services Committee, says Iran isn't required to suspend all enrichment work and he believes the deal "makes a nuclear Iran more likely." The California Republican sees "an even more urgent need" for Congress to impose even tougher penalties. GOP Rep. Ed Royce of California, who leads the House Foreign Affairs Committee, says the agreement lets Iran keep important parts of its nuclear weapon-making capability, yet the U.S. is the one "doing the dismantling" by easing sanctions.