A man wanted in an investigation of shots fired near the White House was arrested Wednesday in Pennsylvania, a day after agents discovered two bullets had struck the executive mansion while President Barack Obama was away, the U.S. Secret Service said. The Secret Service said it discovered Tuesday that the two bullets had hit the White House, one of them apparently cracking a window on the level of the president's living quarters, while Obama and his wife Michelle were on a trip to California and Hawaii. The president has since traveled on to Australia, his second stop on a nine-day tour of the Asia-Pacific region.