5 Things to Know This Morning

April 25, 2013— -- Your look at the five biggest and most buzz-worthy stories of the morning.

1. Single Gun Recovered From Accused Boston Bombers
Police tell ABC News they so far have recovered only a single, semi-automatic handgun from the two men now accused of carrying off the Boston Marathon bombing.

2. Bombing Suspect's Name Was in US Terror Databases
Alleged Boston Marathon bombing suspect Tamerlan Tsarnaev's name was included on two U.S. terror watch databases in 2011 after Russia separately requested assistance from both the FBI and the CIA to investigate his possible ties to Islamic extremism.

3. Bush: Boston Attacks 'Harkened Back' to His Presidency
In an exclusive interview with Diane Sawyer, former President George W. Bush says the Boston bombings "harkened back" to his presidency, saying his mind immediately turned to organized terrorism.

4. 2 Barges Erupt in Flames After Several Explosions
Three people are hurt after fuel barges explode and catch fire in Mobile, Ala. The Associated Press reports the causes of the explosions are not immediately clear.

4. 1 Soda Per Day Raises Diabetes Risk, Study Suggests
A new study out today suggests that just one 12 ounce serving of a sugar-sweetened beverage can raise the risk of developing type 2 diabetes by up to 22 percent.