The answer is not so clear as we are taken on an emotional roller coaster of scenarios.

The Boston Marathon terrorist attacks are the first of it's kind to be captured in a social media world. Images, videos and digital pictures taken by professional as well as amateur photographers are now available in abundance, but still no arrests have been made.

A few days after these bombings, investigators are yet to unravel how a couple of explosions were able to kill three and injure 170.

Don't dismiss your child's fears. Children can feel embarrassed, or criticized when their fears are minimized. Exploring their concerns in a positive way help children master their fear and anxiety.

Parents and professionals can reassure children with facts about how people are protected by helpers, firefighters and police in the community, or the president who meets with world leaders and individual safety measures that can be taken.

FBI investigators have launched a manhunt following the twin blasts which killed three and injured scores more near the finish line of the Boston Marathon. This criminal investigation has now been called an act of terrorism, drawing painful memories of the WTC 9/11/2001 attacks that shocked the world.

From London to Los Angeles and right here in New York City, public safety officials are stepping up security following today's explosions at the Boston Marathon.

Police officers have been sent to congested areas, as well as transportation hubs while officers are being extra vigilant around large crowds and will increase security at sporting events. From the Barkley Center in Brooklyn, Dodger Stadium in LA and in Tennessee, where the Nashville Predators are hosting the Vancouver Canucks tonight, sports fans will experience a visible presence around all these stadiums and arenas.

Three people are reported dead and at least 133 injured at The Boston Marathon, which has now been shut down after two bomb explosions near the finish line, on this Patriot's Day.

Witnesses reportedly heard two loud explosions near the finish line inside the Fairmount Copley Plaza Hotel that sounded like two claps of thunder at storefront windows nearby were blown out.

Hundreds of people have now been evacuated as a result of the two severe explosions. The marathon has now been suspended.

Apr 15, 1947
Jackie Robinson breaks color barrier. Jackie Robinson, age 28, becomes the first African-American player in Major League Baseball when he steps onto Ebbets Field in Brooklyn to compete for the Brooklyn Dodgers. Robinson broke the color barrier in a sport that had been segregated for more than 50 years. Exactly 50 years later, on April 15, 1997, Robinson's groundbreaking career was honored and his uniform number, 42, was retired from Major League Baseball by Commissioner Bud Selig in a ceremony attended by over 50,000 fans at New York City's Shea Stadium. Robinson's was the first-ever number retired by all teams in the league.

Apr 16, 1943
Hallucinogenic effects of LSD discovered. It was in Basel, Switzerland, Albert Hoffman, a Swiss chemist working at the Sandoz pharmaceutical research laboratory, accidentally consumes LSD-25, a synthetic drug he had created in 1938 as part of his research into the medicinal value of lysergic acid compounds. After taking the drug, formally known as lysergic acid diethylamide, Dr. Hoffman was disturbed by unusual sensations and hallucinations. In his notes, he related the experience: