Vice-presidential hopeful Rob Portman caps multi-country tour

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Portman also used his Israeli trip to tout his committee's approval of $210 million for Israeli anti-missile defenses. Portman visited an Iron Dome battery during his trip.

"It was encouraging to see firsthand how this innovative technology is protecting lives and significantly diminishing the effectiveness of a tool terrorists use to inflict harm and escalate violence," Portman said in a statement from Israel.

In Abu Dhabi, he met with crown prince and American and local business leaders before connecting with Reps. David Dreier (R-Calif.) and David Price (D-N.D.) and heading to Kabul with them on Sunday. In Paktika Province, Afghanistan, Portman visited a special forces team and service members from Ohio before heading back to the U.S. on Monday.