Trailing in the delegate count, Bernie Sanders needs a big win Tuesday when four states are up for grabs in the Democratic presidential primaries. Univision visited the home of a local Sanders campaign activist to talk with volunteers who remain hopeful about the outcime. "We still have a shot and we must make the most of it," says A.J. Nichols.

The race for the Democratic primary comes down to four key states on Tuesday, with Florida the biggest prize of. While Bernie Sanders is trailing in the polls, his supporters remain undeterred. (Leer en espanol)

Some of the leading scientists hard at work developing a vaccine can be found in a laboratory in Texas. Pedro Rojas visited the facility to learn more about their work and check on their progress.

A young boy in the Los Angeles school district was killed in a tragic accident while walking to school. A driver ran over the boy and the whole incident was caught on security video. Salvador Duran reports.

While it’s not as big a crisis as the 2008 mortgage debt crisis, the oil and gas sector is expecting thousands of job losses, with knock on effects across the entire economy. (Leer en español)

Geovanny Fuentes allegedly paid at least approximately $25,000 to Juan Orlando Hernández in exchange for protection from law enforcement and access to a cocaine laboratory strategically located near Honduras's largest port, according to a criminal complaint. Hernández ordered Fuentes to report directly to his brother, former congressman Tony Hernández, it adds. (Leer en español)