Terror

South Korean soldiers demonstrate their skills during an anti-terror drills ahead of the 4th Asian Indoor and Martial Arts Games Incheon, which starts from the end of June, in Incheon, west of Seoul, South Korea, Thursday, June 13, 2013. The drills was held against possible terrorists' attack while the threat of terrorism in various sports games are increasing after Boston Marathon terror.

Lee Jin-man/AP

South Korean soldiers participate in an anti-terror drill ahead of the 4th Asian Indoor and Martial Arts Games, which starts from the end of June, in Incheon, west of Seoul, South Korea. The drills were held against possible terrorist attacks following the Boston Marathon bombings.

Yemeni Al-Qaeda militants listen as the judge sentenced them to jail for plotting attacks in Yemen at the Sanaa court on April 23, 2013. The court handed the militants jail sentences ranging between four and 10 years, on charges of forming an armed group to carry out attacks against military, government buildings and foreign interests in Yemen.

Mohammed Huwais/AFP

Yemeni al-Qaeda militants listen as a judge sentences them to jail for plotting attacks in Yemen at the Sana’a court. The court handed out jail sentences ranging between four and 10 years, on charges of forming an armed group to carry out attacks against military, government buildings and foreign interests in Yemen. Read more

Miller, a Transit Police dog with the Massachusetts Transportation Authority Explosives Detection Unit, watches as commuters enter the subway system at Back Bay Station a day after two explosions near the finish line of the Boston Marathon in Boston, Massachusetts April 16, 2013. Two bombs packed with ball bearings tore through crowds near the finish line of the Boston Marathon on Monday, killing three people and triggering  a massive hunt for those behind an attack the White House said would be treated as "an act of terror."

Jessica Rinaldi/Reuters

Miller, a Transit Police dog, watches commuters at Back Bay Station a day after two explosions in Boston. Miller, a Transit Police dog with the Massachusetts Transportation Authority Explosives Detection Unit, watches as commuters enter the subway system at Back Bay Station a day after two explosions near the finish line of the Boston Marathon in Boston, Massachusetts April 16, 2013. Read more