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Donald Trump Jr. tweeted images of emails regarding his 2016 meeting with a Russian lawyer on Tuesday. An intermediary said he could connect Trump Jr. with people who had information "that would incriminate Hillary [Clinton] ... and would be very useful to your father."

Attorney General Jeff Sessions is testifying before the Senate Intelligence Committee on Tuesday, as the investigation continues into Russian attempts to influence the 2016 presidential election.

Former FBI Director James Comey is testifying before the Senate Intelligence Committee on Thursday. Before Comey was fired on May 9, he led the FBI's investigation into Russian interference in the 2016 election and potential ties between Trump associates and Russia. That probe is now led by a special prosecutor.

In 1957, Joel Healy witnessed one of the largest nuclear tests ever conducted on U.S. soil.

Healy was in the U.S. Army, stationed in the Nevada desert north of Las Vegas at Camp Desert Rock. He was 17 years old and a private first class at the time.

Healy drove dump trucks, moved materials, and built structures, like houses, that would be destroyed by the explosions so the Army could study the effects of a nuclear blast. He also helped build the towers where many of the bombs were detonated.

The economic news has been nothing but grim lately: weak expansion, sluggish consumer spending and unemployment holding steady at just over 9 percent.

Overseas, the picture isn't any rosier, with Greece expected to default on its debts — possibly followed by Portugal and Ireland — and the International Monetary Fund predicting a global economic slowdown.

So is the U.S. heading for a double-dip recession? Or are we there already? And what can we do about it?

Operation Twist