TASK DEFINITION: Based on the information present in the given passage, you need to write a correct answer to the given question. A correct answer is one that correctly and completely answers the question. Do not write answers that address the question partially or incorrectly. The correct answer must be contained in the given paragraph.
PROBLEM: Paragraph- Sent 1: The Agencies Confer When they learned a second plane had struck the World Trade Center, nearly everyone in the White House told us, they immediately knew it was not an accident.
Sent 2: The Secret Service initiated a number of security enhancements around the White House complex.
Sent 3: The officials who issued these orders did not know that there were additional hijacked aircraft, or that one such aircraft was en route to Washington.
Sent 4: These measures were precautionary steps taken because of the strikes in New York.
Sent 5: The FAA and White House Teleconferences.
Sent 6: The FAA, the White House, and the Defense Department each initiated a multiagency teleconference before 9:30.
Sent 7: Because none of these teleconferences-at least before 10:00- included the right officials from both the FAA and Defense Department, none succeeded in meaningfully coordinating the military and FAA response to the hijackings.
Sent 8: At about 9:20, security personnel at FAA headquarters set up a hijacking teleconference with several agencies, including the Defense Department.
Sent 9: The NMCC officer who participated told us that the call was monitored only periodically because the information was sporadic, it was of little value, and there were other important tasks.
Sent 10: The FAA manager of the teleconference also remembered that the military participated only briefly before the Pentagon was hit.
Sent 11: Both individuals agreed that the teleconference played no role in coordinating a response to the attacks of 9/11.
Sent 12: Acting Deputy Administrator Belger was frustrated to learn later in the morning that the military had not been on the call.
Sent 13: At the White House, the video teleconference was conducted from the Situation Room by Richard Clarke, a special assistant to the president long involved in counterterrorism.
Sent 14: Logs indicate that it began at 9:25 and included the CIA; the FBI; the departments of State, Justice, and Defense; the FAA; and the White House shelter.
Sent 15: The FAA and CIA joined at 9:40.
Sent 16: The first topic addressed in the White House video teleconference-at about 9:40-was the physical security of the President, the White House, and federal agencies.
Sent 17: Immediately thereafter it was reported that a plane had hit the Pentagon.
Sent 18: We found no evidence that video teleconference participants had any prior information that American 77 had been hijacked and was heading directly toward Washington.
Question: When did the video teleconference in the situation room begin?.

SOLUTION: 9:25 AM.

PROBLEM: Paragraph- Sent 1: Fossils can be used to match up rock layers.
Sent 2: As organisms change over time, they look different.
Sent 3: Older fossils will look different than younger fossils.
Sent 4: Some organisms only survived for a short time before going extinct.
Sent 5: Knowing what organisms looked like at certain times also helps date rock layers.
Sent 6: Some fossils are better than others for this use.
Sent 7: The fossils that are very distinct at certain times of Earths history are called index fossils.
Sent 8: Index fossils are commonly used to match rock layers.
Sent 9: You can see how this works in Figure 2.30.
Sent 10: If two rock layers have the same index fossils, then they're probably about the same age.
Question: What helps to date rock layers?.

SOLUTION: Index fossils.

PROBLEM: Paragraph- Sent 1: When Alexander destroyed Tyre, most of the towns on the route to Egypt quickly capitulated.
Sent 2: A later tradition recorded his entry into Jerusalem: according to Josephus, Alexander was shown the Book of Daniel's prophecy, presumably chapter 8, which described a mighty Greek king who would conquer the Persian Empire.
Sent 3: He spared Jerusalem and pushed south into Egypt.
Sent 4: However, Alexander met with resistance at Gaza.
Sent 5: The stronghold was heavily fortified and built on a hill, requiring a siege.
Sent 6: When "his engineers pointed out to him that because of the height of the mound it would be impossible... this encouraged Alexander all the more to make the attempt".
Sent 7: After three unsuccessful assaults, the stronghold fell, but not before Alexander had received a serious shoulder wound.
Sent 8: As in Tyre, men of military age were put to the sword and the women and children were sold into slavery.
Sent 9: Alexander advanced on Egypt in later 332 BC, where he was regarded as a liberator.
Sent 10: He was pronounced son of the deity Amun at the Oracle of Siwa Oasis in the Libyan desert.
Sent 11: Henceforth, Alexander often referred to Zeus-Ammon as his true father, and after his death, currency depicted him adorned with rams horn as a symbol of his divinity.
Sent 12: During his stay in Egypt, he founded Alexandria-by-Egypt, which would become the prosperous capital of the Ptolemaic Kingdom after his death.
Question: What was Alexander regarding as when he invaded Egypt?.

SOLUTION:
A Liberator.