主播大秀

Former President Barack Obama, and Bill and Hillary Clinton are among those who have been targeted by postal bombs.

Hugh O'Rourke, from security firm MSA Security, says such bombers often act on their own. He explains how security firms screen for such devices.

Electric car firm Tesla has been seen by some as blazing the trail for the future of motoring. But it has also been burning through billions of dollars.

Government investigations and image problems have dogged its chief executive, Elon Musk, and investors have been jumpy because there was no sign of a profit. That has just changed. Tesla has made more than $3m in the last quarter. Shares jumped in after hours trading in New York. Tasha Keeney, an analyst at Ark Invest, explains the turnaround in fortunes.

The hyperloop - passenger-carrying pods suspended by magnets in an airless tube - has been much vaunted as the future of transport. The technology can enable people and goods to be shuttled at speeds of up to 1,200 km/h. But up to now, it has all been just theory. However, plans have just been announced by a US firm to build a hyperloop in the United Arab Emirates. Nick Webster of The National, a Dubai-based website, gives his view.

主播大秀 Presenter Roger Hearing is joined by Jason Abbruzzese of NBC in New York and Jonathan Cheng of the Wall Street Journal in Seoul.

(Picture: Police stand guard outside of the Time Warner Center after an explosive device was found there in New York City. CNN's office was evacuated after a package arrived that was similar to suspicious packages found near the homes of Bill and Hillary Clinton, Barack and Michelle Obama, billionaire philanthropist George Soros and other prominent political figures. Credit: Getty Images)