Midday Roundup: TSA screening crackdown targets cellphone bomb threat

Electronic surveillance. Some U.S.-bound airplane passengers will have to turn their cellphones on and off again to meet added security requirements. The Transportation Security Administration wants to ensure the electronic devices on planes are for legitimate use and not hiding explosives. American intelligence officials recently have shown concern that al-Qaeda is trying to produce a bomb that can pass through airport security undetected.

Stranded. A train breakdown below the English Channel has caused chaos and confusion for travelers. The Eurotunnel train, which carries passengers in their vehicles, stopped about one-quarter of the way along its route from England to France. Passengers were evacuated to service tunnels and then to another train, according to the BBC. They are waiting in France to find out when they will get their cars back. Delays for trains using the tunnel could affect the Tour de France, which began in England this year. Teams were scheduled to travel to France later today.

He told you so. Texas Gov. Rick Perry said this weekend that President Barack Obama ignored his 2012 warning about the border-crossing crisis. Perry said on ABC’s This Week that he hand-delivered a letter to the president in which he laid out how unaccompanied minors were showing up at the border. Perry said the president’s policies created the border crisis and that the White House has allowed it to spiral out of control.

On trial. A trial begins today for a man accused of trying to cover for bombing suspect Dzhokar Tsarnaev immediately after the Boston Marathon bombing. Prosecutors accuse 20-year-old Azamat Tazhayakov of removing a backpack containing fireworks from Tsarnaev’s dorm room after seeing his picture on the news. Tazhayakov is one of three people accused of obstructing justice in the bombing investigation. His trial is the first in a series expected to culminate in November with Tsarnaev’s, in which federal prosecutors say they will seek the death penalty.

Kicking grass. Nadal Djokovic bested Roger Federer to win the Wimbledon men’s tennis championship Sunday, ending his three-tournament Grand Slam losing streak. Djokovic played and lost in the finals of the last three major tennis tournaments. Yesterday’s win propelled the 27-year-old Serb to No. 1 in worldwide rankings. It was his second Wimbledon title and seventh major tennis championship.