The official confirmed that these are the first four Americans that "we've facilitated in this manner" since the withdrawal of US troops from Afghanistan.
Authorities didn't immediately say what may have prompted the incident in Amarillo, a city in the Texas Panhandle.
The Pentagon has awarded Bell Helicopter a contract to manufacture and deliver the choppers to Pakistan under its foreign military sales funds.
US President Obama -- accompanied by National Teacher of the Year Shanna Peeples of Amarillo, Texas -- left the White House for a block-long walk to a tea shop.
A Las Vegas bound flight of a United States airliner made an emergency landing in Texas when the plane's pilot gave a mid-air scare to passengers about a possible attack by Al Qaeda and had to be restrained.
As many as 14 of the 41 young spelling wizards -- who made it to the semi final of the Scripps national Spelling Bee champion's trophy -- are Indian Americans, raising expectations that the top prize would yet again be bagged by one of them.
35 qualify for Scripps National Spelling Bee
All the growth, it says, has meant that investment capital has poured into the sector with clean energy stocks easily outpacing the broader markets. The NASDAQ's 'Clean Edge' index was up 66.67 per cent last year, compared to just 3.53 per cent for the S & P 500 and 9.81 per cent for the NASDAQ Composite. Overall clean energy index returns particularly for wind and solar companies have fared even better.
Gold trading above $900 an ounce begs the question: Who's got the most?