Here's a rundown of the top stories from today's show:
Purdue University released a report that suggests diet soda can not only cause weight gain, but can increase risk of heart disease and stroke.
For the review, researchers looked at a dozen studies published in the past five years that examine the relationship between consuming diet soda and health outcomes.
"There's been a drumbeat for some time about diet drinks and what they're specifically doing," says Dr. Sanjay Gupta, CNN's Chief Medical Correspondent. "What they're saying here is that if they look at all these various studies over the last five years, they find the people who drink diet drinks often are also increasing their risk of several things, diabetes, heart disease, stroke."
The question has been, why? If the drinks are non-caloric, why would these effects be occuring?
According to Dr. Gupta, what they are starting to say is, when you drink a diet drink, it tricks your body. It may raise insulin which could make your body crave sugar. So people drink diet drinks all day long, crave sugar and then binge.
Marla Smith hasn't had custody of her children in more than two years ever since her ex-husband took them to Cyprus, where he is originally from.
The conflict is that an Indiana judge ruled she should have full custody, but a Cyprus court says it has jurisdiction and gave custody to the father, CNN's Pamela Brown reports.
So, who wins out?
"It's devastating. You want to see your children every day and tell them that you love them so much," says Smith, who relocated to Cyprus to be closer to her children. "It's almost like you're mourning the loss of your children, but they're still alive."
Smith vows to keep up her fight. She says Cyprus has issued a warrant for her arrest for failing to pay child support, so she is waiting to be arrested. CNN reached out to the office of Smith's congresswoman who said they will continue to assist with requests to the Department of State.
More than three months after the Boston Marathon bombing, some 30 victims and family members sat shoulder to shoulder at yesterday’s arraignment of bombing suspect Dzhokhar Tsarnaev.
He pleaded "not guilty" to all 30 counts against him, including murdering four people and wounding more than 200 others.
CNN's Deborah Feyerick was in the emotional courtroom on Wednesday.
“His feet were shackled, his hand was in a cast and it appeared he suffered some nerve damage to his face,” Feyerick reports.
Liz Norden’s two sons each lost a leg during the attack. She watched for a sign of remorse from Tsarnaev, but was disappointed.
“No remorse,” she says. “He smirked at the people in the courtroom.”