face trials. police estimated the crowd at 240,000 but organizers say within a million took part. >> american tech companies warning against going through with the ban on chinese huawei, as a recent concern over chinese made products and the potential threat to national security. here are the reports. >> you may not heard about the new front and ongoing cyber work with china. if you take a train to work, chances are you daily commute is in the crosshairs. chinese owned companies called the rrc, it is that a brainstorm of capitol hill over national security. lawmakers are concerned that u.s. subway cars are vulnerable to hacking remote control operation. >> and they, centers and other