Gunmen

Pakistani troops arrive at Bacha Khan University in Charsadda town, some 35 kilometers (21 miles) outside the city of Peshawar, Pakistan, Wednesday, Jan. 20, 2016. Gunmen stormed Bacha Khan University named after the founder of an anti-Taliban political party in the country's northwest Wednesday

Mohammad Sajjad/AP

Pakistani troops arrive at Bacha Khan University in Charsadda town, some 35 kilometers (21 miles) outside the city of Peshawar, Pakistan, Wednesday. Gunmen stormed Bacha Khan University named after the founder of an anti-Taliban political party in the country’s northwest

Smoke rises above Karachi airport terminal Monday, June 9, 2014 in Pakistan. Gunmen disguised as police guards attacked the terminal with machine guns and a rocket launcher during a five-hour siege that killed 13 people as explosions echoed into the night, while security forces retaliated and killed all the attackers, officials said Monday. (AP Photo/Shakil Adil)

Shakil Adil/AP

Smoke rises above Karachi airport terminal in Pakistan. Gunmen disguised as police guards attacked the terminal with machine guns and a rocket launcher. Security forces retaliated and killed all the attackers during a five-hour siege in which at least 29 people died, officials said on Monday. 

Anti-government protesters look at bloodstained floor of the bus they were traveling after an attack by suspected gunmen while on their way back from a protest in Bangkok, Thailand Tuesday, April 1, 2014. Gunmen have fired on a convoy of anti-government protesters in Thailand's capital, and four people have been wounded. (AP Photo)

AP

Anti-government protesters on their blood-stained bus that was part of a convoy attacked by gunmen on its way back from a protest in Bangkok, Thailand on Tuesday. Four people were wounded.