Nine cases of the Zika virus have been detected in Florida, where conditions are just right for the mosquito-borne virus to spread. Zika has been linked to birth defects when pregnant women are infected. Dr. Jon LaPook has more from the center of the Zika outbreak, Recife, Brazil. Source

The cases being investigating occurred in women between the ages of 18 and 48. Source

For inventor Joy Mangano, it all began with an idea for a mop. More than 25 years later, the Miracle Mop is part of a multi-billion dollar empire. Joy Mangano joins “CBS This Morning” to discuss how her story led to the Oscar-nominated movie, “Joy,” starring Jennifer Lawrence. Source

As the majority of school districts in the country are reopening, Anthony Mason follows up with four public high school teachers he first spoke to last summer. Pedro Hernandez, Sheena Graham, Emily Krieger and Matt Baker discuss student and teacher mental health, dealing with trauma, schools reopening and standardized testing. Source

A Congressional hearing begins Wednesday in response to a CBS News investigation. In December, we showed how a costly new cure for hepatitis C isn’t making it to most of the 200,000 U.S. veterans infected with the disease, many as a result of their service. Congress has given $2.7 billion taxpayer dollars to treat veterans with hepatitis C, but only 15 percent have been treated with the drug, one that might not exist without government funding. Chip Reid reports. Source

The Zika outbreak has entered a dangerous new phase, with the first confirmed transmission of the virus inside the U.S. Texas health officials say it likely happened through sexual contact, not a mosquito bite. Dr. Jon LaPook reports from Recife, Brazil with the country’s response at the global emergency’s ground zero. Source

CBS News chief medical correspondent Dr. Jon LaPook reports from Brazil, where authorities are on a “search and destroy” mission to kill mosquitoes carrying the virus. Zika virus is suspected of causing many birth deffects and Brazil is considered Ground Zero. Source

Dr. Thomas Frieden, Director of the Centers for Disease Control, speaks with CBS News’ Scott Pelley on whether the U.S. will see a large outbreak of the Zika virus. Source

Lawmakers from both sides of the aisle are coming together to support new legislation that would help service members suffering after exposure to toxic burn pits. Kris Van Cleave speaks with a woman whose husband was diagnosed with terminal brain cancer about how this legislation could have impacted their lives. Source

Although Hillary Clinton claimed a victory, Monday’s all-important Democratic caucuses in Iowa ended in a virtual tie, according to the party’s leader. CBSN political contributors Leslie Sanchez and Lynda Tran join CBSN to discuss whether this virtual tie is a threat to Hillary Clinton. Source