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ht_vogel: cryogenics demo with liquid nitrogen (IMG_2635)
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ht_vogel: putting balloons in liquid nitrogen (IMG_2637)
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ht_vogel: how many balloons will fit in? (IMG_2640)
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ht_vogel: removing balloons from liquid nitrogen (IMG_2642)
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ht_vogel: balloons warm & expand again (IMG_2644)
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ht_vogel: IMG_2645
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ht_vogel: IMG_2647
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ht_vogel: IMG_2648
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ht_vogel: Glenn & Josiah riding snowmobile (IMG_2656)
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ht_vogel: Glenn & Josiah riding snowmobile (IMG_2658)
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ht_vogel: IMG_2661
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ht_vogel: Isabel & Angelica riding snowmobile (IMG_2662)
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ht_vogel: Isabel & Angelica riding snowmobile (IMG_2665)
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ht_vogel: IMG_2666
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ht_vogel: IMG_2670
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ht_vogel: IMG_2673
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ht_vogel: IMG_2674
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ht_vogel: IMG_2675
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ht_vogel: IMG_2681
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ht_vogel: IMG_2685
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ht_vogel: IMG_2676
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ht_vogel: IMG_2679
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ht_vogel: IMG_2686
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ht_vogel: IMG_2690
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ht_vogel: IMG_2691
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ht_vogel: IMG_2700
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ht_vogel: IMG_2698
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ht_vogel: IMG_2692
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ht_vogel: IMG_2693
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ht_vogel: IMG_2694