When spotting aircraft, observers notice the key attributes of an aircraft.

When surface to air missiles became capable of hitting high flying aircraft bombers, bombers used flight at low altitude to evade radar detection.

When the plane lands at Marseille, a French Gendarmerie assault team boards the aircraft and kills the hijackers.

When flying on an aircraft, a man decides to always bring a bomb with him.

When an aircraft is flying straight and level ( cruise ) most of the lift opposes gravity.

When an aircraft is at rest, there is no circulation.

When the plane lands in Malta, Egyptian commandos storm the aircraft, but 60 people die in the raid.

When in 1942 it became clearer that the fighting would go on for a while, car and truck factories were switched to war work in a modest way, Opel taking up the production of aircraft parts and tanks.

When civil aircraft started to use the field ( 17 December 1920 ) it was often called Schiphol-les-bains.

When landing the aircraft is much lighter due to the loss of propellant weight and a vertical landing is much easier to perform.

When it became clear that Soviet missiles could successfully bring down high flying aircraft, the V bomber force changed to low-level attack methods.

When an aircraft's lift is less than what is required for it to continue flying and stalls, ideally the nose should drop, which allows the aircraft to regain flying speed.

When controllers are responsible for separating some or all aircraft, such airspace is called " controlled airspace " in contrast to " uncontrolled airspace " where aircraft may fly without the use of the air traffic control system.

When carburetors are used in aircraft with piston engines, special designs and features are needed to prevent fuel starvation during inverted flight.

When Congolese aircraft bombed the West Nile villages of Paidha and Goli on February 13, 1965, President Obote again increased military recruitment and doubled the army's size to more than 4, 500.

When they reached Super Six Four, Gordon and Shughart extracted the pilot, Chief Warrant Officer Mike Durant and the other crew members from the aircraft, and established defensive positions around the crash site.

When they reached Super Six Four, they extracted Durant and the crew members from the crash and defended the aircraft.

When the leading edge of a sail is oriented into the wind, the correct curvature helps maximise lift while minimising turbulence and drag, much like the carefully designed curves of aircraft wings.

When the aircraft was at rest, the ailerons hung vertically down.

When landing, ground effect can give the pilot the feeling that the aircraft is " floating ".

When an aircraft is flying at an altitude that is approximately at or below the same distance as the aircraft's wingspan or helicopter's rotor diameter, there is, depending on airfoil and aircraft design, an often noticeable ground effect.

When I show up he will know you are a good wife to have told him about it ''.

When the Know-nothings get control, it will read, All men are created equal except Negroes and foreigners and Catholics.

When the reactionary response is thus bolstered by an intellectual defense, the characteristics of that defense are explicable only in terms of the basic attitudes of unanalyzed reaction.

When combined with the metaphysical notion that pure forms of this universe are best appreciated when least embodied in a material substratum, it becomes clear that while earth will be dross on a scale of material-formal ratios, celestial bodies will be of a subtle, quickened, ethereal existence, in whose embodiment pure form will be the dominant component and matter will be absent or remain subsidiary.

She used to tell me, `` When I stand there and look at the flag blowing this way and that way, I have the wonderful, safe feeling that Americans are protected no matter which way the wind blows ''.

When we consider the disorganized state of the world community, and the legacy of predispositions adversely directed against all who are identified as Jews, it is obvious that the struggle for the minds and muscles of men needs to be prosecuted with increasing vigor and skill.

When these fields are surveyed together, important patterns of relationship emerge indicating a vast community of reciprocal influence, a continuity of thought and expression including many traditions, primarily literary, religious, and philosophical, but frequently including contact with the fine arts and even, to some extent, with science.

When different colors are used, she is just as likely to color trees purple, hair green, etc..

When finally the two bedraggled men reach their friend's home, Voltaire's fears are once again aroused.

`` When are you to leave ''??

When the roof blocks are all in place, the final rows of wall blocks are mortared into position.

When the aid operations are reorganized the Peace Corps should remain a semi-autonomous, functional unit.

When the budget goes to trustees for approval it is the president's budget, to which his faith and credit are committed ; ;

When they have 4 to 6 leaves and are thrifty little plants, it's time to set them out where they are to remain.

When more than two figures are separated by subtraction symbols the subtraction must be carried out from the left to right if the result is to be correct.

When they're on, the top edges are planed even with the sheer batten.

When painting, Mason's physical eyes are half-closed, while his mind's eye is wide open, and this circumstance accounts in part for the impression he wishes to convey.

When improvements are recommended in working conditions -- such as lighting, rest rooms, eating facilities, air-conditioning -- do you try to set a measure of their effectiveness on productivity??

When sufficiently accurate and complete measurements are available, it will be possible to set limits on the thermal and electrical characteristics of the surface and subsurface materials of the moon.

When some thirteen records of newly and recently born individuals are collated, little or no correlation between length and distribution can be detected.

When three dice are tossed repeatedly, what is the probability that the number of aces is 0 ( or 1, or 2, or 3 )??