Here are five stories to have on your radar today:
1. What's next for gun control?: After the Senate rejected gun legislation sponsored by Pennsylvania Republican Pat Toomey and West Virginia Democrat Joe Manchin.The bill would have expanded background checks for people purchasing firearms. Though Democratic leaders in the Senate are vowing to bring up the measure again, it appears that, despite a major push for new gun laws after the December massacre in Newtown, significant legislation won't be passed anytime soon. Toomey says it's "time to move on," and the Sunlight Foundation looks at why pro-gun groups have the upper hand.
2. Fertilizer plant blast: An overnight blast at a Fertilizer plant in Waco, Texas, has left several people dead and dozens more injured.
3. Hunt for Boston bombing suspect: Despite news reports Wednesday that an arrest in the Boston Marathon bombings was imminent, but the search for the perpetrators continues. Investigators say surveillance video has captured a suspect with a backpack acting suspiciously. Facial-recognition technology may prove to be a boon to investigators. Meanwhile, the Penn Relays -- which take place next week at Franklin Field -- are on high alert and examining security procedures.