we are expecting another press done for instancconference somes morning. wwe know the ntsb will be here o start the investigation here. the what and why of the train derailment in bronx, new york. keep it on al jazeera. i'm john seigenthaler, and here's a look at the headlines... >> al jazeera america, there's more to it. >> i'm phil torezz, coming up next on techknow. >> hike! >> america's favorite sport is under fire. >> now, that impact simulated 100 g's of acceleration in your brain. >> it's the opponent no player can see. >> so the system is showing real-time impact. >> can science prevent concussions? >> i did my job and just had to sacrifice my brain to do it. taken to the streets in kiev. they have escalated and they are demanding a new election and the impeachment of the press ar president. the recent clashes have turned violent. >> clashes between rival factions on the streets of kiev have broken out on sunday as the country face as growing political crisis. >> the mass of demonstrateors ae calling for the impeachment of the president. they are i