Gun

Thai riot police officers assist a colleague during clashes with anti-government protesters near Government House in Bangkok...Thai riot police officers assist a colleague after an explosion during clashes with anti-government protesters near Government House in Bangkok February 18, 2014. A Thai police officer was killed and dozens of police and anti-government protesters were wounded in gun battles and clashes in Bangkok on Tuesday, officials and witnesses said. REUTERS/Athit Perawongmetha

Athit Perawongmetha/Reuters

Riot police assist a colleague after an explosion during clashes with anti-government protesters near Government House in Bangkok. A police officer was killed and dozens of police and anti-government protesters were wounded in gun battles and clashes in Bangkok, officials and witnesses said. Read more

An Iranian woman walks past a mural showing a gun painted with an interpretation of the American flag on the wall of the former US embassy in Tehran on September 25, 2013. Leaders from Iran and the United States have not met since the 1979 Islamic Revolution brought often open hostility to their contacts, particularly over Iran's contested nuclear program.

Atta Kenare/AFP

An Iranian woman walks past a mural showing a gun painted with an interpretation of the American flag on the wall of the former US embassy in Tehran on Wednesday. Leaders from Iran and the United States have not met since the 1979 Islamic Revolution brought often open hostility to their contacts, particularly over Iran’s contested nuclear program.

A Syrian military soldier holds his Ak-47 with a sticker of Syrian President Bashar Assad and Arabic that reads, "Syria is fine," as he stands guard at a check point on Baghdad street, in Damascus, Syria, Wednesday, Aug. 21, 2013. Syrian opposition groups claimed scores have died on Wednesday in a government offensive near Damascus, attacks in which some activists say regime troops used "poisonous gas." The government denied the reports.

Hassan Ammar/AP

A Syrian military soldier holds his Ak-47 rifle bearing a sticker with the smiling face of Bashar al-Assad, Syrian president, and Arabic writing that reads, “Syria is fine”, as he stands guard at a check point on a Baghdad street in Damascus, Syria. Opposition groups claimed scores died on Wednesday in a government offensive near Damascus, attacks in which some activists say regime troops used “poisonous gas”. The government has denied the reports

A Somali boy walks with a toy gun along the Lido Beach near Mogadishu on August 8, 2013. Muslims worldwide are celebrating the holiday of Eid Al Fitr which marks the end of Ramadan.

Mohamed Abdiwahab/AFP

A Somali boy walks with a toy gun along the Lido beach near Mogadishu on Thursday

A boy aims his toy gun as he sits with members of the Free Syrian Army in Deir al-Zor

Khalil Ashawi/Reuters

A boy aims his toy gun as he sits with members of the Free Syrian Army in Deir al-Zor

A Free Syrian Army fighter sits on a sofa in the old city of Aleppo...A Free Syrian Army fighter sits on a sofa in the old city of Aleppo, July 3, 2013. REUTERS/Muzaffar Salman (SYRIA - Tags: CONFLICT)

Muzaffar Salman/Reuters

A Free Syrian Army fighter relaxes on a sofa in the old city of Aleppo, Syria on Wednesday

LONDON, ENGLAND - APRIL 22:  Members of the King's Troop Royal Horse Artillery fire a 41-gun royal salute in Green Park to celebrate Queen Elizabeth II's 87th birthday on April 22, 2013 in London, England. Gun salutes in honour of the Queen's birthday have been postponed by one day this year as her actual birthday, which is on April 21st, fell on a Sunday.

Oli Scarff/Getty

Members of the King’s Troop Royal Horse Artillery fire a 41-gun royal salute in Green Park to celebrate Queen Elizabeth II’s 87th birthday (April 22) in London, England. Gun salutes in honour of the Queen’s birthday have been postponed by one day this year as her actual birthday fell on a Sunday. Read more

WATERTOWN, MA - APRIL 19:  Police with guns drawn search for a suspect on April 19, 2013 in Watertown, Massachusetts. Earlier, a Massachusetts Institute of Technology campus police officer was shot and killed late Thursday night at the school's campus in Cambridge. A short time later, police reported exchanging gunfire with alleged carjackers in Watertown, a city near Cambridge. It's not clear whether the shootings are related or whether either are related to the Boston Marathon bombing.

Mario Tama/Getty

Police with guns drawn on Friday search for a suspect in Watertown, Massachusetts. A Massachusetts Institute of Technology campus police officer was shot and killed late on Thursday night at the school’s campus in Cambridge. A short time later, police reported exchanging gunfire with alleged carjackers in Watertown, a city near Cambridge. Read more