Watch CNN.com Live for continuing coverage of the investigation and fallout from the fatal bombings at the Boston Marathon.
Today's programming highlights...
The Jodi Arias trial resumes on Tuesday, April 23
12:00 pm ET - White House briefing - The Boston Marathon bombings, gun control and immigration will likely dominate discussion at today's briefing in Washington.
2:25 pm ET - White House Science Fair - Student winners of science, technology, engineering and math competitions from across the nation gather at the White House for an event hosted by President Obama.
2:50 pm ET - Boston observes moment of silence - Bells across Boston will ring as the city pauses to remember the victims of the Boston Marathon bombings.
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