bomb

Soldiers, policemen and medical personnel gather at the site of explosions near the Iranian embassy in Beirut

Hasan Shaaban/Reuters

Soldiers, policemen and medical personnel gather at the site of explosions near the Iranian embassy in Beirut, Lebanon, which killed at least 20 people and injured more than 95 on Tuesday. Read more

Pakistani Christian protesters chant slogans to condemn a Peshawar suicide attack on a church, in Lahore, Pakistan, Tuesday, Sept. 24, 2013. Pakistani Christians denounced the deadliest attack ever in this country against members of their faith when a pair of suicide bombers blew themselves up amid hundreds of worshippers outside a historic church in northwestern Pakistan on Sunday, Sept. 22, 2013. The placard at right reads, "give us protection." (AP Photo/K.M. Chaudary)

K.M. Chaudary/AP

Pakistani Christian protesters chant slogans to condemn a Peshawar suicide attack on a church in Lahore, Pakistan. Pakistani Christians denounced the attack against members of their faith when a pair of suicide bombers blew themselves up amid hundreds of worshippers outside a historic church in northwestern Pakistan on Sunday. The placard on the right reads: ‘give us protection’. Read more

People run to help outside one of two mosques hit by explosions in Lebanon's northern city of Tripoli, August 23, 2013. At least 13 people were killed and more than 50 wounded in two explosions outside mosques in Lebanon's northern city of Tripoli on Friday, security sources and witnesses said.

Omar Ibrahim/Reuters

People run to help outside one of two mosques hit by explosions in Lebanon’s northern city of Tripoli. At least 13 people were killed and more than 50 wounded in two explosions outside mosques in Lebanon‘s northern city of Tripoli on Friday, security sources and witnesses said

People offer prayer for atomic bomb victims at a cenotaph at the Hiroshima Peace Memorial Park in Hiroshima, western Japan, 06 August 2013 after the Peace Memorial Ceremony commemorating the 68th anniversary of the atomic bombing of the city  in 1945.

Kimimasa Mayama/EPA

People offer prayer for atomic bomb victims at a cenotaph at the Hiroshima Peace Memorial Park in Hiroshima, western Japan on Tuesday after the Peace Memorial Ceremony commemorating the 68th anniversary of the atomic bombing of the city in 1945.

A firefighter is helped as he extinguishes fire at the site of an explosion in Beirut's southern suburb neighbourhood of Bir al-Abed on July 9, 2013.  A car bomb rocked Beirut's southern suburbs, stronghold of Lebanon's Shiite Hezbollah movement,  wounding 15 people, television reports and a military source said.

AFP

A firefighter is helped as he extinguishes a fire at the site of an explosion in Beirut’s southern suburb of Bir al-Abed on Tuesday. A car bomb rocked the suburbs, a stronghold of Lebanon’s Shia Hizbollah movement, wounding 15 people, television reports and a military source said.

Afghan security forces stand guard at the site of a suicide attack near Kabul military airport in Kabul on June 10, 2013. All seven militants who launched an attack on June 10 on Kabul airport died in the assault, Afghan police said, adding that no civilian and security force casualties had yet been reported. "There were seven assailants -- two (suicide bombers) died detonating themselves and five others were killed in fighting," Mohammad Ayoub Salangi, chief of Kabul police, told reporters.

Shah Marai/AFP

Afghan security forces stand guard at the site of a suicide attack near the Kabul military airport on Monday. All seven militants who launched the attack died in the assault, Afghan police said, adding that no civilian and security force casualties had been reported. ‘There were seven assailants – two [suicide bombers] died detonating themselves and five others were killed in fighting,’ Mohammad Ayoub Salangi, chief of Kabul police, told reporters.

Pakistani security officials are pictured at the site of a bomb attack on a vehicle used by security forces on the outskirts of Quetta, the capital of restive Baluchistan province, on May 23, 2013. A bomb planted in a rickshaw tore through a vehicle used by security forces in southwest Pakistan on May 23, killing at least 12 people, police said.

Banaras Khanbanaras/AFP

Pakistani security officials are pictured at the site of a bomb attack on a vehicle used by security forces on the outskirts of Quetta, the capital of restive Baluchistan province. A bomb planted in a rickshaw tore through a vehicle used by security forces in southwest Pakistan on Thursday killing at least 12 people, police said. Read more

Holly Holland, right, hugs her daughter Katie, center, as her husband Kevin Holland, left, all of St. Louis,  looks while visiting a makeshift memorial in Boston, Monday, April 22, 2013. The memorial sits on Boylston St., not far from where two bombs exploded near the finish line of the Boston Marathon, Monday, April 15, 2013

Steven Senne/AP

Holly Holland hugs her daughter Katie, both of St. Louis, while visiting a makeshift memorial in Boston, on Monday. The memorial sits on Boylston Street, not far from where two bombs exploded near the finish line of the Boston Marathon, last week.

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

US President Barack Obama and First Lady

Jewel Samad/AFP

President Barack Obama heads to Boston to mourn victims of the Boston Marathon attacks. No arrests have been made in connection with Monday’s twin bombings near the finish line of the race, which sent metal fragments and nails into a crowd of runners and spectators, killing three people and wounding 180.