Terrorism expert Michael Yardley discusses potential groups responsible for the Lockerbie disaster.

Machinery, Coil and levers

White cliffs - Beachy Head

Falling meteor

Shirtless boy

Hotel Implosion

8K RAW - Railway station platform at night with train departing and people at platform

8K RAW - cu of lights changing green to red at night as train departs with illuminated London skyline.

8K RAW - Stationary shot train arriving at station at dusk with signal lights changing from amber to green

MONTAGE Football player turning somersault when making goal

Car crashing into store, hitting dad and baby

Man washing car

Drunk lawn mower driver

Hanging man

Cow and gate

Cat and milk

8K RAW - Low angle shot of train leaving station with lights changing green to red at night.

8K RAW - Train signal lights changing on station platform at night as train departs

8K RAW - Train station guard in high viz jacket standing by Gatwick express train at Clapham junction at night

8K RAW - Train signal lights changing on station platform at night. Amber to green

8K RAW - Passengers by stationary train on platform at night. Camera moves at end.

Thief tripping over

Pigs on farm

Dog guarding bag

8K RAW - Gatwick express as leaving train station at night low angle

MONTAGE Baseball hitting car window past outfield

Convoy of warships

MONTAGE Baseball bat caught in net

MONTAGE Teenager skating off wall and falling

WS MS PAN Ostrich racing

MONTAGE Deer running onto horse track

Thief robbing bank

Desert plants

Old buildings

Destroyer at sea

Feeding camel

Hanks of cotton passing through machine

8K RAW - Signal light changing from red to green as train leaves station at night with London buses

London rooftops from Big Ben

Destroyer with Planes flying over

Destroyer at sea

Friends playing ping pong

Thief running into window

Airplane taking off

Sitting dogs

Man throwing feces

People dancing at party

Wild goat

Motorcycle hitting car door

Orangutans

Cat with toy

8K RAW - Trains arriving with green signal light at night as train departs with illuminated London skyline.

8K RAW - low angle view of train leaving station with lights changing green to red at night and London skyline.

8K RAW - Railway train arriving at night past green signal sign with flowers in breeze in foreground

8K RAW - Passenger including black men and white men and women boarding train in London at night

8K RAW - Empty train station at night with amber signal in view

Man running away

MONTAGE Young man jumping and kicking his head

Countdown (14): Ep 6, Show 546

Dallas implosion

Suburban street

Accident during parachute jump

Security guards in action

Young man in room

El Paso City Hall Implosion

Skillful boy

Police officer arresting

Man on car's roof

Boy jumping

Women dancing on table

Machine winding cotton on to bobbins

Oil tanker at sea

Hitting lightpole

Thief stealing purse

Cruiser steaming with land in background

Section of deck of battleship

Handheld shot through trees to large country estate in snow. 4K

PAN WS MS Boat Lands On Woman Boat comes onto shore and hits woman

Dancing at wedding

Ship convoy

Bus accident

Pulled over by police

MONTAGE Horse racing

MS Ball hitting monitor in office

Man rescuing victim

Two merchant ships

Man with parachute

Kid and hare

8K RAW - Train leaving station at dusk and under bridge

8K RAW - Train signal lights from amber to double amber at dusk in London

Airplane flying and landing

Car crashing into clerk in store

MONTAGE Football fan chasing ball and falls

Man teasing rooster

Man jumping on police car

Thief breaking into house

Groom and bride falling

Man in running wheel

People sledding

boy eating flower

Thief breaking window

Monkey in dress