SPOKANE, Wash. (AP) — The FBI said Wednesday that agents have arrested a 37-year-old man after a pair of letters containing the deadly poison ricin were discovered in Washington state last week.

PHOENIX (AP) — The Jodi Arias trial had all the ingredients of a circus the minute it started: sex and violence, a defendant more than willing to seek the spotlight, a judge who extended leniency in allowing lengthy testimony and cameras in court — and a media-savvy sheriff ready and willing to set up jailhouse interviews with his most famous inmate.

LUBBOCK, Texas (AP) — The driver of a parade float involved in a train wreck that killed four war veterans in West Texas told investigators that the oncoming train appeared to be stationary, and that he didn't notice anything was wrong until he saw people jumping from the float, according to documents released Wednesday.

WASHINGTON (AP) — At the center of a political storm, an Internal Revenue Service supervisor whose agents targeted conservative groups swore Wednesday she did nothing wrong, broke no laws and never lied to Congress.

WASHINGTON (AP) — The Obama administration acknowledged for the first time Wednesday that four American citizens have been killed in drone strikes in Pakistan and Yemen since 2009.

LAKELAND, Minn. (AP) — When high school student Zach Sobiech learned he didn't have much longer to live, his mother suggested he write letters to tell his loved ones goodbye.

GRAPEVINE, Texas (AP) — As protesters made one last stand, the Boy Scouts of America's leadership began a conference Wednesday that was expected to culminate in a long-anticipated vote on whether to allow openly gay Scouts — a decision that, either way, could deeply affect the organization's membership and funding.

MOORE, Okla. (AP) — Nicknamed 'The Wall,' 8-year-old Kyle Davis loved soccer and going to Monster Truck exhibitions at the fairgrounds with his grandfather.

HAGERSTOWN, Md. (AP) — The WikiLeaks organization and a handful of journalists asked a federal judge Wednesday to order greater transparency in the court-martial of an Army private who has acknowledged sending reams of classified document to the WikiLeaks website.

SWARTHMORE, Pa. (AP) — Student activists at more than 200 colleges are trying a new tactic in hopes of slowing the pace of climate change: They are asking their schools to stop investing in fossil fuel companies.

ST. PAUL, Minn. (AP) — A fourth-grade field trip to a Mississippi River park popular with fossil hunters turned deadly Wednesday when gravel saturated by persistent rain gave way, killing one child and injuring two others.

NEW YORK (AP) — Anthony Weiner knows there may be a lot of New Yorkers who would never consider voting for him again, but he says he's running for mayor because he wants to bring his ideas to the fore — and win.

MOORE, Okla. (AP) — The tornado that struck an Oklahoma City suburb this week may have created $2 billion or more in damage as it tore through as many as 13,000 homes, multiple schools and a hospital, officials said Wednesday as they gave the first detailed account of the devastation.

In a medical first, doctors used plastic particles and a 3-D laser printer to create an airway splint to save the life of a baby boy who used to stop breathing nearly every day.

ORLANDO, Fla. (AP) — A Chechen immigrant was shot to death by authorities early Wednesday after he turned violent while being questioned about his ties to one of the Boston Marathon bombing suspects, officials said.

IOWA CITY, Iowa (AP) — When Michael Klunder enticed two girls to enter his pickup truck near a rural Iowa school bus stop Monday, it was at least his third kidnapping in a long criminal history in which he was ordered to receive sex offender treatment starting as a teenager.

BANGOR, Maine (AP) — Police laid out their case Wednesday against a man accused of killing a 15-year-old girl whose body was found in a wooded area miles from her home, but the details remained hidden from public view after a judge sealed a crucial affidavit at the request of the suspect's lawyer.

WASHINGTON (AP) — President Barack Obama's nominee for transportation secretary — Charlotte Mayor Anthony Foxx — received a friendly reception from senators of both parties Wednesday laced with warnings that the nation needs to make a host of transportation improvements with no clear way to pay for them.

WASHINGTON (AP) — A key House committee chairman on Wednesday sharply criticized a wide-ranging immigration bill just passed by a Senate committee, underscoring the difficulties ahead as the politically volatile measure moves forward in a divided Congress.

MOORE, Okla. (AP) — With its single-story design and cinder-block walls, Plaza Towers Elementary School may have seemed sturdy when it was built a couple of generations ago.

WASHINGTON (AP) — A new push to thwart Iran's nuclear ambitions by crippling the country's economy gathered momentum on Capitol Hill Wednesday with approval of legislation by the House Foreign Affairs Committee that would impose even tougher economic sanctions against Tehran.

RICHMOND, Va. (AP) — A civil liberties group filed a federal lawsuit Wednesday on behalf of an ex-Marine who was detained in a psychiatric facility after posting anti-government messages on Facebook, using the case to criticize a program that looks for veterans who may have become extremists.