1 american, nate hen, visiting for a few months on the facebook page before he left the usa, he said he was looking forward to working with them and he said he loved the country. several other americans believed to have been wounded in those attacks. chuck, savannah, back to you guys. >> all right. tom aspell in london this morning, thank you. >> disturbing. big day in the gulf. a turning point perhaps. work is you should way for a new tighter fitting cap on the leak one that holds the promise of capturing most if not all of the oil gushing into the gulf. nbc chief environmental affairs correspondent anne thompson on duty in venice, louisiana, this morning. give us an update on where things stand on this operation to put thesealing cap and the helix. >> reporter: first, the sealing cap, savannah. they're about halfway there in the process. something called the transition spool, the first part of this sealing cap is on top of the