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The second suspect in the Boston Marathon bombing has been captured. Dzokhar Tsarnaev was taken into police custody Friday night -- five days after the bombing that left three dead and left more than 100 injured, police said. The 19-year-old was apprehended after a manhunt that began Thursday night with the fatal shooting of an MIT officer and extended into the evening hours on Friday.

Special Agent Rick DesLauriers of the FBI, who is leading the investigation of the Boston Marathon bombings, just held a press conference in which he revealed that there are two suspects. The FBI released photographs and video of two men believed to be responsible for the attacks.

After days of combing through huge amounts of photographic and video evidence of Monday's bombings at the Boston Marathon, authorities have two clear video images of suspects that they plan to release to the public Thursday afternoon.

Authorities say that five to 15 people may have died in last night's massive explosion at the West Fertilizer Plant in West, Texas. Many more, perhaps more than 160, were injured.

2:45 p.m. (EST): The Boston Police Department has announced that "there has not been an arrest in the Marathon attack." Investigations are ongoing. 2:35 p.m.: CNN is retracting their previous report that an arrest has been made in the Boston Marathon bombings. Other sources are reporting that officials are close to identifying a suspect after reviewing area surveillance video, but no arr

1:10 p.m. (EST): A third letter, this one sent to Senator Joe Manchin (D.-W.V.), has been found to contain ricin. 12:45 p.m. (EST): FBI spokesman Paul Bresson has confirmed that the substance found in the letter to the president was ricin. The Secret Service says that a letter containing a suspicious substance and addressed to President Obama was received on Tuesday at a White House mail facility.

A heart-wrenching photo of 8-year-old Martin Richard, who was killed in the Boston Marathon bombing on Monday, shows the boy holding a hand-drawn sign that says, "No more hurting people. Peace."

As a parent, the hardest part of coping with any tragedy—be it a national or personal one—is finding the words to explain the unexplainable to your children, society's most innocent members.

Three people were killed and more than 100 injured on Monday afternoon when two explosions went off near the finish line of the Boston Marathon. Rescue organizations have gathered to help and at the the tragic scene, but how can you help? The Huffington Post has put together a helpful list of ways:

9 p.m. (EST): The final press conference of the day with Massachusetts Governor Deval Patrick, Boston Police Commissioner Ed Davis and various other officials just concluded. The FBI is now leading investigations of the events. Davis confirmed that three people were killed in today's blasts. CNN is reporting that one of the victims killed was an 8-year-old boy. The Wall Street Journal had reported