A policeman watches a graffiti done by artist Arker Kyaw welcoming U.S. President Barack Obama in Yangon, Myanmar, at dawn on Saturday, Nov. 17, 2012. When Arker Kyaw heard Obama was coming to Myanmar, he gathered 15 cans of spray paint and headed for a blank brick wall under cover of darkness. Kyaw, whose passion is graffiti, labored from 3 am until the sun came up. (AP Photo/Gemunu Amarasinghe)

Associated Press
A policeman watches a graffiti done by artist Arker Kyaw welcoming U.S. President Barack Obama in Yangon, Myanmar, at dawn on Saturday, Nov. 17, 2012. When Arker Kyaw heard Obama was coming to Myanmar, he gathered 15 cans of spray paint and headed for a blank brick wall under cover of darkness. Kyaw, whose passion is graffiti, labored from 3 am until the sun came up. (AP Photo/Gemunu Amarasinghe)
A policeman watches a graffiti done by artist Arker Kyaw welcoming U.S. President Barack Obama in Yangon, Myanmar, at dawn on Saturday, Nov. 17, 2012. When Arker Kyaw heard Obama was coming to Myanmar, he gathered 15 cans of spray paint and headed for a blank brick wall under cover of darkness. Kyaw, whose passion is graffiti, labored from 3 am until the sun came up. (AP Photo/Gemunu Amarasinghe)
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