Rock

1:10 p.m. (EST): A third letter, this one sent to Senator Joe Manchin (D.-W.V.), has been found to contain ricin.

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.

Read More

A heart-wrenching photo of 8-year-old Martin Richard, who was killed in the Boston Marathon bombing on Monday, shows the boy holding a hand-drawn sign that says, "No more hurting people. Peace."

Read More

Three people were killed and more than 100 injured on Monday afternoon when two explosions went off near the finish line of the Boston Marathon. Rescue organizations have gathered to help and at the the tragic scene, but how can you help?

The Huffington Post has put together a helpful list of ways:

Read More

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.

Read More

While most of the nation's attention is on the men's NCAA Tournament, let's not forget that there are some very talented women playing for their national title.

Read More

The Irish car bomb (a shot of Irish whiskey and Irish cream dropped into a pint of Guinness) is a standard St. Patrick's Day cocktail, though its origins aren't commonly known.

Read More

Nearly nonstop college basketball and a highly anticipated UFC matchup are among the best offerings on the upcoming sports calendar. Here's what to watch this weekend:

Read More