1.   The official Antara news agency said the pilot had radioed ahead for landing instructions minutes before the crash and had said the haze was causing poor visibility.

2.   Kickoff of the Siena match was delayed by nearly one hour after smoke-bombs hurled by Lazio fans filled the Tuscan stadium, causing diminished visibility.

3.   Officials at the airport Monday said dusty harmattan winds that blow from North Africa south to the Atlantic may have caused poor visibility.

4.   Officials said dusty harmattan winds that blow from North Africa south to the Atlantic may have caused poor visibility.

5.   Officials said dusty winds that blow from North Africa south to the Atlantic may have caused poor visibility.

6.   They said dusty winds that blow south from North Africa to the Atlantic may have caused poor visibility.

7.   Heavy rain and cloud cover are said to have caused poor visibility at the airfield at the time.

8.   A sandstorm causing bad visibility around Cairo International Airport on Friday forced five airplanes to land in other domestic airports, civil aviation officials said.