Good evening. I'm Jeff Bennett and I'm Amna Navaz on the news hour tonight. An arson

attack disrupt train lines in Paris on the opening day of the Olympics despite unprecedented

security at this year's games.

You're never going to have 100% security.

There is always going to be, a vulnerability that is a question of

intent and capability for some maligned actor to exploit that. The head of the

powerful Cinalloa drug cartel and the son of the notorious El Chappo are arrested after flying to the US.

And another brutal wildfire season brings devastation to the Western US and Canada. Welcome to the news hour. Just hours before the Olympics opening ceremony,

Saboteurs launched a coordinated arson attack on French train lines.

It stranded nearly a million travelers and sparked even more concerns about potential threats

to the games which are being protected by unprecedented security.

Nick Schifran starts our coverage.

In Paris train stations this morning, crowds and confusion after coordinated attacks on France's high-speed rail lines.

The overnight sabotage severed signaling cables that controlled the northbound, westbound,

and eastbound lines.

A fourth attack on the southbound line was foiled.

Prime Minister Gabriel L'etal said the perpetrators knew what they were doing.

This operation has been prepared, coordinated, and key points have been targeted, which

shows a certain knowledge of the network in order to know where to hit. French officials haven't specified a suspect but acknowledge the games face

threats. 45,000 police, 18,000 soldiers and 18,000 security contractors have created a huge security perimeter

and closed Paris's airspace within 90 miles.

In April, President Emmanuel Macron inaugurated the Aquatic Center and warned of one possible perpetrator, Russia.

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