QUES: According to the radar reconstruction, American 77 reemerged as a primary target on Indianapolis Center radar scopes at 9:05, east of its last known position. The target remained in Indianapolis Center's airspace for another six minutes, then crossed into the western portion of Washington Center's airspace at 9:10. As Indianapolis Center continued searching for the aircraft, two managers and the controller responsible for American 77 looked to the west and southwest along the flight's projected path, not east-where the aircraft was now heading. Managers did not instruct other controllers at Indianapolis Center to turn on their primary radar coverage to join in the search for American 77. In sum, Indianapolis Center never saw Flight 77 turn around. By the time it reappeared in primary radar coverage, controllers had either stopped looking for the aircraft because they thought it had crashed or were looking toward the west. Although the Command Center learned Flight 77 was missing, neither it nor FAA headquarters issued an all points bulletin to surrounding centers to search for primary radar targets. American 77 traveled undetected for 36 minutes on a course heading due east for Washington, D.C. By 9:25, FAA's Herndon Command Center and FAA headquarters knew two aircraft had crashed into the World Trade Center. They knew American 77 was lost. At least some FAA officials in Boston Center and the New England Region knew that a hijacker on board American 11 had said "we have some planes." Concerns over the safety of other aircraft began to mount. A manager at the Herndon Command Center asked FAA headquarters if they wanted to order a "nationwide ground stop." While this was being discussed by executives at FAA headquarters, the Command Center ordered one at 9:25. The Command Center kept looking for American 77. At 9:21, it advised the Dulles terminal control facility, and Dulles urged its controllers to look for primary targets. At 9:32, they found one. Several of the Dulles controllers "observed a primary radar target tracking eastbound at a high rate of speed" and notified Reagan National Airport. FAA personnel at both Reagan National and Dulles airports notified the Secret Service.
Do you have any questions?
MY QUESTION: When did Dulles detect a primary target that triggered them to alert Reagan National Airport?

QUES: You might want to know how cold it is. You may need to know how fast the wind is blowing. Maybe it rained last night? Do you know how much? Does it feel humid to you? You have heard all these questions before. To answer these questions, we need data. That data comes from special tools. These tools collect data about the weather. You can see some of the common tools listed below: A thermometer measures temperature. An anemometer measures wind speed. A rain gauge measures the amount of rain. A hygrometer measures humidity. A wind vane shows wind direction. A snow gauge measures the amount of snow.
Do you have any questions?
MY QUESTION: What data are collected by special tools?

QUES: Earths magnetic field helps protect Earth and its organisms. It protects us from harmful particles given off by the sun. Most of the particles are attracted to the north and south magnetic poles. This is where Earths magnetic field is strongest. This is also where relatively few organisms live. Another benefit of Earths magnetic field is its use for navigation. People use compasses to detect Earths magnetic north pole. Knowing this helps them tell direction. Many animals have natural 'compasses' that work just as well. Birds like the garden warbler in Figure 1.36 use Earths magnetic field. They use it to guide their annual migrations. Recent research suggests that warblers and other migrating birds have structures in their eyes. These structures let them see Earths magnetic field as a visual pattern.
Do you have any questions?
MY QUESTION: How do garden warblers use the earth's magnetic field to guide animal migration?

QUES: (CNN) -- Sevilla have sacked coach Manolo Jimenez after their disappointing home draw to bottom-club Xerez on Tuesday extended the club's winless run to seven games. Despite lying fifth in the Spanish Primera Liga table, Sevilla were knocked out of the lucrative European Champions League by Russian side CSKA Moscow last week. Jimenez had also secured a Copa del Rey final against Atletico Madrid but it wasn't enough to save the 46-year-old's job. The club's sporting director Ramon Rodriguez admitted the decision had been difficult but said he had "done what I had to." He told the club's official Web site: "It was an unavoidable situation and we had to find a solution, and the pain that it brings. "Tuesday was the end of the story but the decision comes from the image and dynamics of the team. Without doubt we are grateful to Manolo. He is an excellent professional, he has made all this possible and impossible. However it is obvious that he could not get a response out of the team. "Fortunately we believe that there is time. The growth and the ambition of the club is shown in the change of the manager. We are fighting for important things." Xerez's injury-time equaliser on Tuesday meant Sevilla's last league success was against Real Mallorca back in February. Ironically, it is Mallorca who occupy the much-coveted fourth spot in the table that guarantees Champions League football next season. Jimenez took charge in October 2007 when former coach Juande Ramos left to take over at English Premier League team Tottenham.
Do you have any questions?
MY QUESTION:
Name three factors that contributed to the removal of coach Manolo Jimenez: