jet ever built, crashing to earth just six minutes after takeoff in ethiopia. and take a look at this image tonight, because investigators say that relatively small crater right there speaks volumes about how fast that jet was coming down. you can see the burn scar across the field. the plane shattered in pieces, along with fragments of what people carried with them. 157 people onboard, including eight americans, no one survived this. tonight, the first clues now coming in, and as other countries ground this jet, will the jets be grounded here in the u.s.? boeing s new response tonight. abc s matt gutman leads us off from ethiopia, where american investigators have just now arrived. reporter: this heap of twisted metal scraps, all that remains of ethiopian airlines flight 302. and tonight, investigators race to analyze those crucial flight recorders to find out why the plane, carrying 157 souls, fell out of the sky. excavators digging for debris in the crater.