On Wednesday’s NewsHour…

SECURITY CONCERNS AFTER NY BOMBING ATTEMPT | Following the arrest of a man accused of trying to detonate a bomb in New York City’s Times Square, Jeffrey Brown talks to Guardian reporter Declan Walsh in Pakistan and Denis McDonough, chief of staff of the National Security Council, about the security implications of the failed bombing plot.

OIL CLEANUP IN THE GULF | Tom Bearden continues his reports from the Gulf Coast with an update on BP’s attempts to cap one of the major leaks at the well-head. Then, Judy Woodruff talks to him about progress to contain further spread of oil contamination.

MARINE ECOSYSTEMS IN DANGER FROM OIL LEAK | Judy Woodruff talks to Sylvia Earle, National Geographic’s explorer-in-residence, about the potential damage to the marine ecosystems from the oil leak in the Gulf. Watch an Emmy-nominated profile of Earle from our public broadcasting colleagues at KQED:

VIOLENCE IN GREECE | Deadly riots erupted in Athens in response to Greece’s plans to adopt harsh cuts and taxes to fix its debt crisis. Jonathan Rugman of Independent Television News gives an update on the unrest and Margaret Warner talks to reporter John Psaropoulos in Greece.

BRITISH PREPARE FOR ELECTION | British voters are preparing to weigh in at the polls in the country’s general election on Thursday. Simon Marks previews the heated elections as three political parties vie for a majority in parliament.

Monday’s anchors are Judy Woodruff and Jeffrey Brown. Hari Sreenivasan will have the day’s other top news stories and a look at Web features, including more on the lead up to the British Election from GlobalPost correspondent Michael Goldfarb, updates from Tom Bearden at the site of the oil leak in Louisiana and a lesson plan for teachers on the offshore drilling debate.

Plus, we have an update from Haiti on the mental health challenges following the January earthquake.

We hope you join us.