EXPLOSION

When it comes to insurance, for a bombing to be certified as an act of "terrorism," it has to meet a formal definition agreed upon by the secretaries of treasury and state and the attorney general.

A fertilizer plant near Waco, Texas exploded Wednesday, resulting in scores of injuries and, possibly, many fatalities.

About 100 people are possibly injured following an explosion at a fertilizer plant in Waco, Texas, Wednesday night.

The secretary of state made an emotional statement Wednesday while speaking about the Boston Marathon bombings.

A blast near the southern India city of Bangalore injures at least 16 people, authorities say.

Yankee Stadium played "Sweet Caroline" on Tuesday, a staple at Fenway Park, as a tribute to the Boston Marathon tragedy victims.

Bostonians gathered at the Boston Common and outside Martin Richard's home for two separate vigils.

Seth MacFarlane responds to an episode of 'Family Guy' that's been manipulated to show Peter blowing up a bridge to win the Boston Marathon.

The Westboro Baptist Church plans on protesting at the funerals of the Boston Marathon tragedy victims.

Hollywood actor took to Facebook Monday to write about the Boston Marathon tragedy.

A list of centers to donate blood for the victims of the Boston Marathon attack.

Media outlets around the world scrambled to gather information following the bomb explosion at the finish line of the Boston Marathon Monday.

A hot air balloon caught fire and exploded near the Egyptian city of Luxor Tuesday, killing 19 tourists, including British, French, Hong Kong and Japanese nationals.

W49B is an unusually shaped supernova remnant that scientists think might have a new black hole at its core.

Scientists say the asteroid 2012 DA14 that passed close to Earth on Friday and the fireball over Russia are not connected.

The mid-air explosion of a meteor over Russia echoes another extraterrestrial encounter that occurred more than a century ago known as the Tunguska Event.

A Syrian opposition group alleged Tuesday that the mini-bus explosion on the Syria-Turkey border Monday that killed 10 Syrians and four Turkish nationals may have targeted the group’s delegation.

The capture of the Al-Furat dam has been touted as one of the major strategic victories for the rebels.

The monkey that was presented post-flight and the monkey that was loaded into the capsule seem like very different animals.

Mexican officials are searching for the cause of a Mexico City explosion that killed 14 people and injured 100 more on Thursday.

Thieves attempting to break in and rob a church in Houston were thwarted when one of the thieves cut the main electrical line, causing the church to explode.