12:45 p.m. (EST): FBI spokesman Paul Bresson has confirmed that the substance found in the letter to the president was ricin.
The Secret Service says that a letter containing a suspicious substance and addressed to President Obama was received on Tuesday at a White House mail facility. This comes just after a letter sent to Senator Roger Wicker (R.-Miss.) was found to contain the poison ricin.
Yesterday's twin bombings at the Boston Marathon dominated the front pages of newspapers everywhere. We gathered a few from the Newseum for you to take a look at how various publications across the country shared the story.
9 p.m. (EST): The final press conference of the day with Massachusetts Governor Deval Patrick, Boston Police Commissioner Ed Davis and various other officials just concluded. The FBI is now leading investigations of the events. Davis confirmed that three people were killed in today's blasts.
CNN is reporting that one of the victims killed was an 8-year-old boy. The Wall Street Journal had reported that as many as five other unexploded devices were found around Boston, but investigators now doubt that they were actually bombs.
Today, April 15, is Tax Day, and while most of you have filed your 2012 returns, surely some of you out there are going down to the very last minute ... or maybe even a bit beyond. Here are a few important reminders:
The Masters ended in a thrilling two-hole playoff on Sunday evening, with Adam Scott defeating Angel Cabrera to become the first Australian to capture the coveted green jacket. Does this make you more likely to tune in for the next tournament?
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